It sounds like adding subtitles (or at least a transcript underneath) to your videos would solve a few of your problems.
I’m not sure what you would be planning on hosting your videos on but at my work we use Microsoft Stream to host recordings (cost reasons) and it let’s you search through the subtitles of videos as well as set chapter markers too, both of which I believe are also supported by public facing sites like YouTube too.
Of course, “why write a transcript when you could just write a document,” and, fair. But if you’ve got a script for your video might as well make it into subtitles right? And besides some people, including myself, appreciate a video over written documentation so I can see the thought processes behind things rather than having to abstract it from screenshot or descriptions. I don’t mind written documentation but when presented with the choice I’ll go for the video
“Ahh, just an episode of something before I got to bed,” I innocently say to myself