For some subjects it's not possible to read everything. For example: woodworking safety for a particular machine, or adjusting the carburetor by ear on a vintage motorcycle.
The Youtube auto-generated transcripts work that way. On most videos, you click on the "..." (3 dots) to access it. Then click on the text fragment and it instantly seeks to that part of the video.
Since it uses AI algorithms, there will be misspelled names or technical terms but it's still useful.