Not only YouTube: a webinar, a recorded lecture, a film in a player, a podcast, a video in a chat app. If your computer can play it, SpeakFlow Pro can translate it as it goes.
It listens to the sound card, so the source does not matter — a streaming site, a local file, a conference stream, a video in Slack.
A natural voice reads the translation over the top, and the original is turned down automatically so the two are not fighting each other.
Drag the caption panel under the video and resize it. Text and voice both, or captions only if you prefer to read.
Keep the bilingual transcript, or ask for a short summary of what you just watched.
One preset sets the mode, the routing and the echo settings together.
What they speak — or Auto, which copes with someone switching language mid-sentence — and what you want to hear.
That is all. Nothing needs installing for this direction, on either platform.