i have learned to not expect quality content from Youtube. Most channels pump out videos to grow their channel so they all have to play games(clickbait titles, flashy thumbnails, fluff videos to a certain length to please YT algorithm) and now that YT is trying to compete with tiktok, they also encourage channels to have shorter videos, and you cannot explain anything mildly complex in that short period of time.

Imo text should be the main source, then use YT videos as supplemental material