X, the windowing system for Unix (and other OSs), based on when you count it from is 40 years old, and its still in use. As Wayland looks ready to take over...
With Wayland becoming more and more popular, it’s interesting to look at the around 40 year history of X.
…unless the videos have captions, in which case you absolutely can.
View the transcript, search for something, click what you found and boom: You’re at that precise moment in the video.
For literal grep, use something like NewPipe to download the subtitle file.