Yes. Castr can send a prerecorded MP4 to YouTube as a live broadcast and repeat it, but a continuous all-day loop is plan-dependent, so check the limits on your account before scheduling it.
This is not a regular YouTube upload that automatically restarts for every viewer. Viewers join one live stream in progress; Castr plays the file as that shared broadcast.
What it means to loop one MP4 on YouTube
A looped MP4 in this workflow is the source for a live channel, not a setting on an ordinary YouTube video. You upload a file to Castr, select a looping schedule and send its playback to YouTube. When the file reaches the end, the schedule can begin it again, subject to the available loop mode and plan limits.
That difference affects how people watch. With an uploaded video, each viewer can start from the beginning, pause or seek within the playback controls YouTube provides. With a live broadcast, a new viewer arrives at the live point and sees what is playing then. Someone who joins halfway through a bhajan or lecture does not automatically get a fresh start at the start of the file.
A loop can suit a devotional channel, an ambience station, or a shop display where the aim is to keep one programme available without an operator at a computer. It may not suit a lesson where each viewer needs chapter order or a clear beginning. If your aim is a radio-style rotation rather than one repeated file, the guide to recorded songs in a 24/7 Gospel radio-style stream covers a different programming shape.
Before building around the loop, decide what “all day” means for your channel. You may need a stream that remains live continuously, a file that repeats, or just a video people can replay on demand. Those are related but distinct outcomes. Castr’s pre-recorded workflow addresses the first two; it does not turn a normal upload into a personal repeat player for every viewer.
How Castr plays prerecorded video
Castr’s pre-recorded stream workflow takes an uploaded video and sends it out as a live feed to a destination such as YouTube. The viewer-facing experience is a YouTube live stream, even though you are not presenting a camera feed in real time. Castr’s guide to starting a prerecorded stream documents the MP4 input and the basic setup path.
The documented input for this feature is .mp4. The guide also says file size and the number of files you can use depend on your subscription, so do not assume a file that uploads on one account will fit another account’s allowance. If your source is in another format, prepare an MP4 copy before you start; check the actual account limits and encoding requirements in Castr’s current interface rather than relying on an old export preset.
Castr describes scheduling modes for prerecorded streams, including a Loop mode that repeats the playlist. A playlist with one MP4 is therefore the simplest case: its one item is played, then the schedule returns to that item. Castr’s scheduling modes documentation explains how its loop option works.
The important distinction is between being able to make a prerecorded stream and having permission for continuous looping at the duration you want. The existence of an upload field or a Loop choice in a setup flow does not by itself tell you that your current tier supports an unattended, ongoing cycle. Treat plan eligibility as a separate check before you publish the YouTube destination or announce a 24/7 schedule.
Check continuous-loop support before planning a day
Castr’s help material describes prerecorded streaming across plans, while its current product page places continuous infinite looping on Premium and higher. These are not contradictory: a plan can support prerecorded broadcasts without offering the same continuous loop entitlement or limits as another plan. Castr’s product information for prerecorded live video is the place to recheck the current distinction before committing.
Plan names and allowances can change. The guidance here is not a promise that a particular subscription will accept a file of a particular size or run it for a particular duration. In your Castr account, look for the current plan’s loop mode, maximum file size, file duration, storage allowance, and any restrictions on continuous streaming. If the account dashboard and a general help page appear to differ, ask Castr support which limit applies to the account you will use.
It is worth checking these details before you upload a large source or design a whole day’s schedule. A devotional channel with one long recording may encounter a duration limit; a playlist of several smaller programmes may encounter a file count or storage limit. The solution depends on the limit, and changing the schedule after sharing the live link can confuse viewers.
There is also an operational difference between an all-day test and a persistent channel. For a test, you can watch the beginning, observe one repeat, and stop. For an unattended schedule, you need to know what the plan does when the source ends, whether the destination remains active, and whether you can make changes without ending the public stream. Confirm these behaviours in the current account before treating the workflow as hands-off.
Upload the MP4 and select Loop
In Castr, open Pre-Recorded Streams and create a stream. Upload the MP4 or import it from a supported cloud source in the interface. Allow the file to finish processing, then check that the selected video and any playlist order are correct. An upload that is still processing is not the same as a ready-to-play source.
Choose Loop as the scheduling mode if you want the playlist to repeat. When there is only one item, the repeated playlist is simply that file again. Check whether the interface presents a continuous or infinite option, and confirm that it is enabled for your account before proceeding. A short finite schedule that plays a file once or a set number of times is not equivalent to an all-day cycle.
Before making the stream public, review the file itself. Check the first and last seconds for abrupt cuts, ensure the audio does not jump in level at the repeat point, and verify that any title card or spoken introduction makes sense to someone arriving mid-playback. If the end fades to silence but the beginning starts loudly, the loop seam may be distracting each time it repeats.
For music, include only material you have the necessary rights to broadcast. YouTube’s livestream terms and conditions put responsibility for rights on the broadcaster, including relevant music rights. That applies to the source file’s audio and visuals, not only to material added during the live setup. If the stream drops and you need to diagnose the cause, a separate guide to keeping a church YouTube stream running through internet drops explains why the source, connection and destination are separate parts of the chain.
Connect YouTube and enable the destination
Add YouTube as a destination in the Castr stream configuration. Castr documents connecting through its YouTube integration or by supplying YouTube’s streaming server and stream key; the Castr YouTube connection guide walks through those paths. Use the method shown in your current account and follow the prompts for the YouTube channel you intend to broadcast from.
If you use a stream key, treat it like a password. Do not paste it into a public note, screenshot, or message, and replace it in YouTube if you believe it has been exposed. Check that the destination is connected to the right channel before you start; a valid connection to the wrong channel is still a problem.
Then verify that the YouTube destination toggle is switched on. A stream can be configured in Castr while a destination remains disabled, so do not infer that the video will reach YouTube just because the source and schedule are ready. Review the YouTube event or live control room as well, so you know which broadcast the public link will open.
For a channel that uses several destinations, keep the YouTube selection explicit. If you only need YouTube, there is no benefit in enabling other destinations accidentally. This is a YouTube-only publishing question: the steps described here are about delivering a live feed to YouTube, not converting the file into a universally hosted replay.
Start the broadcast and verify what viewers see
Once the file, loop mode and YouTube destination are ready, start the stream in Castr. Open the YouTube watch page from a separate browser or device and confirm that playback is live, the picture is correct, and audio can be heard. Do not rely only on the preview inside the configuration screen; the viewer-facing page confirms that the destination is actually receiving the broadcast.
Watch long enough to see how the end of the MP4 behaves. For a single-file loop, the useful test is not merely that the first frame appears. Confirm the transition at the end and beginning, and check whether the repeat is smooth enough for the content. For a quiet ambience video, a brief black frame may be noticeable; for a spoken lecture, a title sequence that repeats may interrupt the listening experience.
Keep the public live link and the Castr control page distinct in your notes. The public link is for viewers; the control page is where you check the source and destination. If a viewer reports that the stream is offline, check the YouTube status and Castr destination before changing the file. For a self-managed FFmpeg setup, alerts for when YouTube goes offline are a useful contrast: monitoring responsibilities differ by workflow.
For the first unattended run, schedule it when someone can check the public page after launch and again around the expected first repeat. That does not prove the stream will never fail later; it gives you a chance to catch a wrong destination, an unexpected stop at the file end, or a bad loop seam before leaving it alone overnight. Record what you verified and the plan limits you confirmed, so the next person managing the channel does not have to guess.
What viewers and archives should expect
A live audience shares a timeline. If one person watches for an hour and another opens the page later, they may see different parts of the same MP4. A viewer who wants the full programme from the start should be given a separate on-demand upload where appropriate, or clear instructions about when a particular segment repeats. A live stream is useful for presence and continuity, but it is not a substitute for every playback style.
Do not assume YouTube will preserve a complete replay of an indefinitely running stream. YouTube says streams under 12 hours can be automatically archived, while streams exceeding 12 hours may not be captured at all; see YouTube’s archive guidance. If an archive matters, make a separate recording or plan a controlled end and restart within YouTube’s documented archive window. That still calls for checking the current YouTube guidance and testing the result on your channel.
If the archive is absent or incomplete, the live channel may have worked as intended even though the replay did not. Decide in advance whether you need a continuous public feed, a complete recording, or both. Those require different operational plans. Do not tell viewers that an all-day broadcast guarantees an all-day replay.
Monetisation is a separate question from technical delivery. YouTube’s channel monetisation policies say content should be original and authentic and identify repetitive or mass-produced content as a concern. A repeated prerecorded file alone does not establish whether a channel will qualify or not; assess the content and channel against the current policy, and do not treat successful streaming as approval.
For an operator whose main difficulty is leaving a computer and home connection running overnight, a managed workflow can remove that particular burden. StreamNeo takes an uploaded file and stream key and runs the YouTube broadcast without requiring your computer to remain on, with monitoring and automatic restarts if a drop occurs. It is YouTube-only; you still need to prepare content, confirm rights, and understand YouTube’s archive and monetisation rules.
Choose the workflow that matches the viewing job
If viewers need a shared always-available channel, a looped live broadcast is a reasonable format. If they need to start a programme whenever they arrive, a normal YouTube upload is usually clearer. If you need both, publish an on-demand version separately and use the live stream for the continuous schedule, while keeping titles and descriptions clear enough that viewers can tell which is which.
| Need | Looped Castr live stream | Regular YouTube upload |
|---|---|---|
| Viewer joins at | The live point, in a shared broadcast | The start of that viewer’s playback |
| Repetition | Set in the prerecorded stream schedule, subject to plan support | Not a per-viewer live schedule; viewers control their playback experience |
| Best fit | Continuous channel presence or a shared programme feed | A programme viewers should start, pause or revisit on demand |
| Archive expectation | Long live streams may not produce a complete YouTube archive | The upload itself remains the on-demand item, subject to normal platform handling |
The table is a decision aid, not a guarantee about how YouTube will handle a specific channel or archive. A looped stream also does not mean that the file will appear as an ordinary upload whose playback restarts independently for every person. The distinction should be visible in your title, description and schedule.
If you are comparing ways to keep an always-on channel alive, include the people and equipment you must keep available as well as the feature list. A computer-based stream gives you direct control over the playback setup, but it also leaves the operator responsible for the device and connection. A cloud-run prerecorded feed shifts that particular task away from your local machine, while leaving plan limits, content rights and YouTube-side behaviour to verify.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
Can Castr repeat just one MP4, rather than a playlist?
Yes. Castr’s loop mode repeats a playlist, and a playlist containing one uploaded MP4 repeats that file. Confirm that continuous looping is supported by your account’s current plan before relying on it for an all-day stream.
Does YouTube restart the video for each viewer?
No. Castr sends the file as a live broadcast, so viewers join the shared live point rather than opening a separate playback that starts at the beginning. Use an ordinary upload if viewers need an on-demand start point.
Will YouTube save the whole day as a replay?
Do not count on it. YouTube says streams under 12 hours can be archived automatically, while streams longer than that may not be captured at all. Make a separate recording or plan a suitable restart if a complete archive matters.
Is every Castr plan suitable for an infinite loop?
No. Castr distinguishes general prerecorded streaming from continuous infinite looping, which its product page lists for Premium and higher. Check the current account’s plan, duration and file limits before you schedule.