In Larix Broadcaster on Android, enter your YouTube stream key in the connection’s Connection URL field, not in a separate key field when following Larix’s documented combined-URL setup. Put the YouTube server URL first, add a slash, then add the key: server URL/stream key.
You can find both values in YouTube Studio’s Live Control Room. After saving and selecting the connection in Larix, start the feed and check that YouTube shows a preview before you make a scheduled stream public.
Find the stream URL and key in YouTube Studio
Open YouTube Studio and go to Go Live. In the Live Control Room, choose the Stream tab and locate the server URL and stream key for the stream you are preparing. The exact labels and layout may change, so use the values displayed for your account rather than copying an address from an example or an old setup.
YouTube’s encoder setup guide explains how to find the URL and key and enter them in an encoder. YouTube describes the key as a credential that allows the encoder to send a feed to the channel. Keep it private, much like a password: do not put it in a public post, send it in an open group, or include it in a screenshot you share for troubleshooting.
If this is your first time streaming, check that live streaming is enabled for your channel before you spend time diagnosing Larix. YouTube says first-time activation can take up to 24 hours. Channel eligibility for encoder streaming is distinct from the eligibility rules for streaming directly from the YouTube mobile app, so do not assume that being able to use one route proves the other is ready.
Use the server address shown for the stream you intend to send. If you choose RTMPS, copy the RTMPS endpoint shown in the Live Control Room; do not simply change rtmp to rtmps in an address by guesswork. YouTube recommends RTMPS, and its RTMPS guidance covers the secure ingest connection and troubleshooting. The address and key must be a matching pair for the stream configuration.
For a longer-running channel, it also helps to plan the content and operating routine before you start. For example, the 24/7 Naam Simran stream guide discusses the broader demands of keeping a devotional channel running; this Larix setup is only the connection step, not a substitute for preparing the stream itself.
Open Larix connection settings
Launch Larix Broadcaster on the Android device that will send the stream. Open the app’s settings and go to Connections. Softvelum’s Larix documentation identifies the connection URL as the place for the publishing address, while its Grove guide shows the settings and connection flow for its YouTube example.
The route is Settings → Connections. Depending on the app version, the controls may be laid out somewhat differently, but look for the list of saved connections and the control to add a new one or edit an existing one. You are configuring a destination that Larix can use when it publishes; this is separate from choices about camera framing, overlays, or what the audience sees.
Before changing a saved connection, check whether it is used for another broadcast. Editing the existing destination may replace its address, while adding a new one allows you to keep separate entries for different channels or events. Name connections clearly, such as “YouTube evening session”, but keep the actual key out of the name. A readable label can help you select the right destination without putting the credential where it might be visible in a screen recording.
Larix is an encoder app, so it sends the camera and audio feed from the phone to YouTube. If your aim is instead to run a prerecorded file as an always-on channel while your phone is off, that is a different workflow. The article on running a Tamil internet radio station around the clock explores that broader continuous-channel use case; the steps here are for a live feed sent from Larix on Android.
Add or edit a connection
In Connections, choose the add control to create a destination, or select an existing connection and open its edit controls. Give the connection a label you will recognise, then look for Connection URL. That is the important field for the documented Larix setup. YouTube’s general encoder instructions often describe the server URL and stream key as separate encoder settings; Larix’s documented method combines them in the connection URL instead.
Do not assume that every encoder app uses the same field arrangement. Follow the model shown by Larix for this connection rather than trying to force YouTube’s generic wording into a field that the app does not provide. If you see a separate field labelled Stream Key in a different app or workflow, that does not change where Larix expects its combined publishing address.
Set the connection to send Video+audio for the documented YouTube configuration. Softvelum’s YouTube example uses that mode. This matters even if the audience experience is mostly musical or spoken audio: the publishing setup described is a video-and-audio feed, and a static image or camera view can supply the visual part. Do not select video-only or audio-only on the assumption that the destination will accept it in this configuration.
Keep the connection’s settings limited to what you have verified. If you are testing a scheduled programme, use the correct channel and intended stream details, and avoid changing unrelated settings while trying to solve a connection error. If you operate a channel built around recorded clips, the guide to looping a YouTube gaming stream with VLC and OBS is about a different production method; it can help clarify that a phone encoder and a computer-based loop are not interchangeable workflows.
Enter the server URL and slash-separated key
In Connection URL, enter the YouTube server URL, a forward slash, and then the stream key, with no spaces inserted around the slash. The pattern is:
server URL/stream key
Softvelum’s documentation gives this example of the combined form:
rtmp://a.rtmp.youtube.com/live2/abcd-efgh-abcd-efgh
The sample suffix is illustrative only. Do not paste that example into your own connection. Replace the first part with the actual server address in your Live Control Room and the final part with the corresponding key shown there. The slash separates the server endpoint from the stream name/key in the publishing address; it does not mean that Larix has a second key box to fill in.
Check the result before saving. The beginning should match the protocol and server endpoint YouTube supplied, and the ending should match the key associated with the stream you are setting up. Avoid accidentally pasting a space, punctuation mark, or line break at either end. If you copied the URL and key separately, place exactly one slash between them. If YouTube’s interface supplies a combined value for your current configuration, follow the displayed format and Larix’s connection instructions rather than adding another slash.
The protocol is a real choice, not a cosmetic prefix. RTMPS encrypts the connection and is YouTube’s recommended option; use the matching RTMPS server URL from the Live Control Room when selecting it. Larix supports RTMP and RTMPS, but the endpoint and protocol must agree. If you get an SSL or connection error, verify the copied RTMPS address and the app’s compatibility before changing other parameters. YouTube’s RTMPS troubleshooting page discusses port 443 as a possible setting where required by the encoder and server combination; do not apply it blindly if Larix and your network do not call for it.
Save and select the connection
Save the new or edited connection. Return to the connection list and check that the label is present. Then select that connection as the destination Larix will use. A saved entry is not necessarily the active one: if you have multiple destinations, confirm the selected name before starting the broadcast.
This is a useful point to catch a common mistake: a correct URL can still fail if Larix is pointed at a different saved connection. Read the selected label, then revisit the URL only if the destination or later preview indicates a problem. Avoid repeatedly rebuilding the connection without checking which one is active.
If the key has been reset in YouTube Studio, the old saved URL will no longer be the value to use. YouTube’s stream settings guidance explains how to reset a stream key and update the encoder. After a reset, edit the Larix Connection URL and replace only the old key portion with the new one, keeping the correct server URL and slash format. A reset is not a routine troubleshooting step; use it if the credential needs to be replaced, not as a first response to every failed connection.
Treat the saved connection as sensitive because it contains the key. Do not share a screenshot of the URL field or copy the complete address into a public support thread. If you need help, describe the field and the visible error without exposing the credential. If you believe someone else has obtained the key, reset it through YouTube Studio and update Larix with the replacement.
Start streaming and check YouTube’s preview
When the connection is selected, start the stream from Larix. Watch the app’s status and then return to the YouTube Live Control Room. You are looking for the incoming feed and a preview image there. YouTube recommends checking the preview before starting a public scheduled stream, so do not treat pressing Larix’s start control as proof that viewers can see the programme.
If the preview appears, check both picture and sound. Confirm that the image is the intended camera or scene and that audio is arriving at a usable level. Give the preview a moment to populate rather than immediately changing the URL. Only after checking the Live Control Room should you proceed with the scheduled stream’s own go-live controls, following the sequence shown in YouTube Studio.
If YouTube does not show a preview, work through the likely causes in a calm order. First confirm that Larix is using the connection you just saved. Next compare the beginning of the Connection URL with the server URL in the Live Control Room and check that the key at the end is current. Then check whether you chose RTMP or RTMPS consistently. A typo in the endpoint, an outdated key, or a mismatched protocol is more plausible than a mysterious change to the phone’s camera settings.
Network capacity is another consideration, particularly on mobile data or a shared Wi-Fi connection. YouTube’s live-streaming tips recommend upload bandwidth headroom beyond the stream’s bitrate, because other traffic and changes in a mobile connection can interfere with delivery. Test from the actual location if the stream matters: a connection that works at home may behave differently in a venue. For a more detailed discussion of monitoring network use in a computer-based setup, see how to monitor CPU and bandwidth for a Linode YouTube livestream; its environment differs from a phone, but the principle of checking available capacity remains useful.
If the phone connection drops, avoid assuming that the stream key is wrong. Check the network first, then verify the URL and protocol, and finally inspect any error message Larix or YouTube provides. For an event with an audience waiting, do a rehearsal using the intended device, location, account, and connection. That tests the whole path from Larix through YouTube’s preview rather than only whether the settings screen accepts text.
What to check before the actual broadcast
A short preflight check reduces last-minute guesswork. Confirm that the channel’s live-streaming access is enabled, the stream is scheduled or otherwise prepared in Studio, Larix has the intended connection selected, and the phone has adequate power and a stable network. The stream key field can be correct while the channel, schedule, or network is not ready.
| Check | What to confirm | Why it matters |
|---|---|---|
| YouTube values | Server URL and current key from the intended Live Control Room stream | Prevents sending to an old or different destination |
| Larix destination | Correct saved connection is selected | Saving a connection does not by itself select it |
| URL format | Server URL, one slash, then key | Matches Larix’s documented combined URL method |
| Protocol | RTMP or RTMPS matches the supplied endpoint | Avoids an endpoint and transport mismatch |
| Media mode | Video+audio is selected for the documented setup | Ensures the connection includes both media types |
| Preview | Picture and sound appear in YouTube Studio | Confirms YouTube is receiving the feed before going public |
This check is especially useful if more than one person helps prepare a channel. One person can verify the scheduled event in YouTube Studio while another checks the Larix connection, without reading the secret key aloud or sending it in a message. If a detail needs correction, the person with account access can update it directly in the relevant app.
For a live channel that is meant to run continuously, think beyond the initial connection. Larix is appropriate when the Android device is the encoder and the content is being sent live from it. It is not the same as an unattended prerecorded-file workflow. StreamNeo removes the specific burden of keeping a phone or computer running to transmit a prepared video continuously: you upload the file, connect your YouTube stream key, and the broadcast can run with your own device switched off. It is YouTube-only, so choose a different workflow if you need to publish to another platform.
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
Where exactly does the YouTube stream key go in Larix on Android?
Open Settings → Connections, then add or edit a connection. Put the YouTube server URL, a slash, and the stream key together in the Connection URL field, following Larix’s documented combined-address format.
Should I paste the key into a separate field?
Not for the combined URL method documented by Larix. YouTube’s general encoder guidance may describe server URL and key separately, but in Larix’s method they form one publishing address in Connection URL.
What should I do if the preview does not appear in YouTube Studio?
Check that the intended Larix connection is selected, then verify the server URL, current key, slash, and protocol against the values in the Live Control Room. Also check the network and whether live streaming is enabled for the channel; do not share the key while asking for help.
What if I reset the stream key?
Edit the saved Larix connection and replace the old key with the new one, preserving the server URL and slash format. Start the feed again and confirm that YouTube’s preview appears before proceeding with the scheduled broadcast.