If you need to keep the full 24/7 broadcast on your own drive, use OBS recording. If you only want to save a recent moment when something happens, use Replay Buffer and its save hotkey.
YouTube Live DVR is separate: it controls whether viewers can seek back during the live broadcast. It is not an OBS recording mode, and turning it off does not stop OBS from recording locally.
Choose according to what you need to retain
Start with the question of what you will want to find later. A continuous local recording is for keeping the whole programme: perhaps a devotional channel’s overnight bhajan stream, a study session you need to review, or a local news loop you want to retain. Replay Buffer is for saving a recent stretch after you notice an event, such as a useful question in chat or a brief audio problem. It does not provide a complete archive of the broadcast.
These choices solve different problems. Continuous recording writes an ongoing file, so it brings sustained storage use and another output to monitor. Replay Buffer keeps recent footage available in memory until you ask OBS to save it; the requested segment then becomes a file. It avoids keeping every hour locally, but you have to notice the moment and trigger the save in time.
| Decision | Replay Buffer | Continuous recording |
|---|---|---|
| Retention goal | Save recent footage when requested | Keep the full stream locally |
| Saved output | A recent segment, after using the save control | An ongoing recording file or files |
| Main planning concern | Buffer settings, memory and saved clips | Disk capacity, recording settings and retention duration |
| Operator action | Enable it and configure a save hotkey | Set the path, format and quality, then start recording |
| Relation to YouTube DVR | Separate from viewer seeking | Separate from viewer seeking |
The table compares purpose and controls, not a guarantee about performance. OBS behaviour and interface labels can vary by version and configuration. If the footage must all be available later, choose continuous recording rather than relying on a buffer or on what viewers can seek through on YouTube.
It also helps to separate three meanings of “keep”. OBS recording keeps a local copy on the computer or attached storage you choose. Replay Buffer saves selected recent footage locally when requested. YouTube DVR gives viewers a way to seek back within a live stream when the feature is available and enabled. None should be mistaken for another. If you are deciding how to retain an archive for a channel, the practical considerations in planning storage for a library of pre-recorded streams are useful beyond the specific archive in that article.
Use OBS recording for a continuous local copy
In OBS, configure recording as its own output and begin it when you want local footage retained. The recording guide covers the path, format and quality controls. Recording is the relevant choice for a continuous copy, but it is not a set-and-forget substitute for checking the destination drive: an overnight stream can generate a file for many hours, and a full or disconnected drive can interrupt the workflow.
Decide how the file will be used before choosing settings. If you want a local copy that follows the live output closely, the “Same as stream” recording preset uses the stream’s settings. OBS notes that recordings cannot be paused under this preset. Choosing a different recording quality gives you more control over the local result, but requires additional system resources. The size of that impact depends on the encoder, the selected settings and the computer; there is no universal load figure to apply to every setup.
A higher-quality recording may also take more disk space. OBS describes “High Quality” as a medium-file-size preset and “Indistinguishable” as larger, with possible performance impact on weaker or older hardware. “Lossless” is especially demanding in storage terms: OBS Project reported around 7 GB of data per minute of video for its lossless preset in 2023. That is a figure for that specific preset, not a typical estimate for every recording. Do not use it as a shortcut for calculating your own output; use your actual settings and a test file.
A local copy can be useful even if YouTube keeps a replay available, because the local file serves a different retention purpose and may be easier to inspect or edit. It also creates responsibility for the file: check that recording actually started, that the destination remains available, and that the files you keep can be found later. If your real requirement is a channel that continues while your computer is off, local OBS recording and local OBS broadcasting are not the same operating arrangement. For the continuous YouTube source itself, see the practical setup discussion in running a 24/7 study stream for CA exam preparation.
Use Replay Buffer to save recent footage on demand
Replay Buffer suits a different rhythm. You enable it in OBS output settings, set a maximum replay time and memory limit, and assign a save hotkey. OBS then keeps recent footage available so that, when you press the save hotkey, it writes a recent segment to a file. The buffer is not an ongoing archive that automatically preserves every part of a long stream.
That makes it useful for a channel where only occasional moments matter locally. For example, a presenter might want to retain the answer to a question that came in unexpectedly, while a music channel operator might save a segment to investigate a brief change in sound. In either case, the buffer is a way to capture a recent window without recording every hour as a separate continuous local copy.
There is an operational trade-off: someone or something must decide that a moment should be saved. If you are away from the keyboard and an event passes, it may no longer be in the recent footage available for saving. Set and test the hotkey before depending on it, and make sure you know where the resulting clips are written. OBS’s overview describes Replay Buffer as a separately enabled feature with a save hotkey; consult its current interface and your installed version rather than assuming every label is unchanged.
The current OBS interface includes controls for maximum replay time and maximum memory. Those limits do not translate into one universal memory amount for a given duration: output settings and encoder behaviour matter. Avoid assigning a one-size-fits-all RAM figure. Start with a modest target that suits the event you need to retain, test it on the actual scene and encoder, and watch how the computer behaves. Replay saving is also unavailable while recording is paused, according to the OBS interface strings, so check how the two outputs interact in the version you run.
For a simple distinction, ask whether the footage should exist automatically or only after an operator requests it. If the answer is “all of it”, use recording. If the answer is “only the recent part around selected events”, Replay Buffer may be appropriate. A channel built from a playlist has separate continuity decisions as well; looping a folder of videos in OBS with VLC covers one source arrangement, not a replacement for choosing a retention method.
Configure the recording path, format and quality
Set the recording path deliberately. Choose a drive with enough room for the duration and quality you plan to keep, and confirm the folder is available to OBS after restarts. If the path points to removable storage or a location that can disconnect, account for that risk. The official guides do not prescribe a universal drive capacity or write-speed requirement for every stream, because file size varies with settings and duration.
OBS recommends MKV as a practical recording format when resilience to an ungraceful stop matters. If recording ends unexpectedly, an MKV file is less likely to have the entire file corrupted than a format that depends on a clean finalisation. This does not make any format immune to every failure. OBS says it remuxes after recording stops; if you need a different container, use the remux workflow and verify the converted file with a short test before relying on it.
Quality is a balance among the local result, disk use and available processing capacity. “Same as stream” keeps the recording aligned with the stream settings, but cannot be paused. A different quality can serve a different local purpose, such as producing a clearer source for later editing, at the cost of extra system resources and possibly larger files. OBS’s preset guide gives the broad trade-off between High Quality, Indistinguishable and Lossless. Treat the labels as choices to test, not as a guarantee of what your particular machine will sustain overnight.
For a 24/7 setup, do not begin by selecting the most demanding option. Record a representative segment, including the scenes and audio you expect to run, and inspect both the output and OBS’s system behaviour. If you change recording quality, test again; a stream that is stable without a second output may behave differently when recording at another quality. This is especially relevant on an older or lightly specified computer, where the additional work may compete with the live encoder.
Also plan how long you will keep recordings and how you will make room for new ones. If you retain every day indefinitely, storage use accumulates; if you keep only selected periods, decide when and how older files will be moved or removed. Calculate from your measured output under your chosen settings rather than a generic per-minute estimate. Include some room for variation between scenes and content, and check the drive before leaving a long run unattended.
Keep YouTube Live DVR separate from OBS capture
YouTube’s live DVR is a viewer-facing control. When it is available and enabled, viewers can seek back while the broadcast is live; disabling it removes that live rewind experience. It does not turn off OBS recording, change the OBS Replay Buffer, or decide whether OBS writes a local file. A recording may also be available after a live stream, but that is separate from a local OBS copy and from the live DVR behaviour.
This distinction matters when viewers ask to rewind a prayer, lesson or news item. Changing DVR affects their ability to seek back during the broadcast, not your local retention goal. Conversely, starting an OBS recording does not make the YouTube live player’s DVR controls appear. Decide separately whether you need viewer seeking and whether you need a file under your control.
YouTube’s guidance also covers encoder settings and stream health. It recommends selecting settings that provide a reliable stream for the available connection, testing with representative audio and movement, and monitoring stream health during the event. It recommends RTMPS. As YouTube Help puts it, “We recommend running a speed test to test your upload bitrate.” Follow the current YouTube live encoder settings guidance and YouTube Live DVR help for the controls and advice applicable to your channel.
If your concern is dropped frames or interruptions, adding a local recording is not a fix for the outgoing stream. It may give you footage to inspect, but you still need to check the encoder, connection and stream health. The checks in YouTube’s dropped-frames warning guide address that separate problem.
Check the result and storage workflow
Treat a brief test as a check of basic operation, not evidence that an unattended 24/7 workflow is ready. Follow YouTube’s advice to test with movement and audio like those in the planned stream, then monitor stream health. For a continuous local archive, extend the test long enough to see how files accumulate and whether the destination remains available. The suggestion to run a sustained test is practical advice for this use case, not a stated YouTube requirement.
During the test, confirm the exact outcome you chose. For recording, verify that the file appears in the expected folder, plays through to the end, and has usable sound and picture. If you selected MKV and intend to remux, test that step too. For Replay Buffer, trigger the hotkey after enough time has passed to create the intended recent segment; open the saved clip and check its content and location. A hotkey that is configured but never tested is not a dependable workflow.
Then check what happens when the stream runs longer. Watch available disk space, confirm that the next recording can be created, and decide how older output will be handled. If another person operates the channel, write down the path, save hotkey and retention routine in plain terms. This reduces the chance that useful footage is saved to an unexpected folder or that a drive fills while nobody is checking it.
When you need the full local record, keep continuous recording as the primary choice and test the chosen format and quality. When you need only occasional recent segments, Replay Buffer can limit how much footage you keep, provided someone can save the moment in time. If you need viewers to rewind live content, review YouTube DVR separately. StreamNeo can remove the need to keep a computer running OBS solely to keep a pre-recorded YouTube broadcast going, which is a different problem from deciding whether to retain local footage.
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FAQ
Does Replay Buffer record the whole 24/7 stream?
No. Replay Buffer is for saving recent footage when you request it, so it should not be treated as a complete archive. Use continuous OBS recording when you need the full local stream retained.
If I turn off YouTube DVR, will OBS stop recording?
No. YouTube DVR controls whether viewers can seek back during a live broadcast; it is separate from OBS output. Disabling DVR does not stop OBS from recording locally.
Which recording format should I use for a long stream?
OBS recommends MKV as a practical choice when an ungraceful stop is a concern, because it reduces the risk of corrupting the entire recording. It does not prevent every failure, so test the recording and any remux step you need before relying on it.
How much disk space should I reserve?
There is no universal amount: settings, encoder and recording duration determine the file size. Make a representative test with your chosen settings, measure the resulting output, then plan capacity and file retention around that result.