Are we sure YouTube doesn't already do this? Often I have searched for a video while only remembering a certain phrase or even a certain comment left under it, and YouTube was able to actually find it
That's why VideoMentions Search exists. It provides a way to search the videos within a YouTube channel to reliably find spoken word matches (and it includes matches in the title & description, too).
Thanks for checking out my project! Please let me know if I can answer any questions about it.
Also you can search individual videos by showing transcript and pressing ctrl-f
As I wrote in another comment, I've run tests where I open up the transcript of a video using these steps (https://kb.swtc.edu/page.php?id=90230), copy a few of the words, then perform a search using those words across that channel, and the video I copied the words from doesn't appear on the list of results.
If Google decides that it's going to revamp YouTube search to include spoken word/transcription matches, that would make VideoMentions Search irrelevant– and I'd be okay with that!
In the meantime, I think this is a useful free tool for quickly finding spoken word matches within specific channels.
Thanks for checking it out!