Why live streams are the hard case
Almost every "YouTube transcript" tool works the same way: it downloads the caption file YouTube generates after a video is complete. That works fine for uploads, but a live stream has no finished caption file until the broadcast ends - which can be hours away. YouTube's own live captions only appear on screen as you watch; there is no history to scroll back through and nothing to search.
Transcribing a live stream therefore means listening to the audio itself and converting it to text in real time. That is what LiveScript does: it captures the stream's audio as it airs and pushes each line to your browser within seconds, building a full, searchable transcript history while the stream is still running.
Step 1: Paste the stream URL
Go to livescript.live, click Start, and paste the URL of the YouTube live stream (a regular youtube.com/watch?v=... link works). LiveScript begins capturing the audio immediately - there is nothing to install for YouTube and Twitch. Finished videos work too, but the live case is the one nothing else handles.
Step 2: Watch the transcript build in real time
Within seconds, spoken words start appearing in the transcript pane next to the embedded player. The transcript stays in sync with the live edge and keeps growing for as long as the stream runs, so a six-hour broadcast becomes a six-hour text document you can skim in minutes.
Step 3: Search, or set keyword alerts
Type any phrase to filter the entire transcript history instantly - what has already been said, not just what is on screen now. If you are waiting for something specific to be said, add keyword tags and LiveScript plays a sound the instant a tagged word is spoken. This is the workflow traders, journalists, and analysts use to react to a spoken phrase before a clip of it exists.
Free vs Pro: what to expect
The free plan transcribes with a 5-minute delay and keeps 30 minutes of history - enough to try the pipeline on a real stream. Pro ($19.99/month) is real-time: words appear within seconds, history is unlimited, you can run multiple streams at once, switch on multilingual mode for non-English streams, and export the finished transcript as VTT or SRT subtitles. If you only need it for one big event, a $4.99 Day Pass unlocks everything Pro has for 24 hours.
Going further
If you follow specific channels, drop alerts email you within about a minute of a channel going live and can auto-start the transcript, so it is already building by the time you open the link. The Chrome extension puts the same transcript in a side panel next to the YouTube player, and can capture audio from any other site that plays sound. Developers can consume the live transcript over a WebSocket via the API.
For the full feature rundown, see the live YouTube transcript page - or the Twitch equivalent if that is where your streams are.