That is something that is said like common wisdom but even if true, video is a slower way to learn the same amount of information versus reading. Plus monetized video (almost all of them) are going to have a ton of filler content just to hit minimum length metrics, plus sponsors, etc etc.

In addition reading is a better way to get details. If you just want surface level understanding and are basically just wasting time, then sure watch a video. Don’t confuse the understanding you get from the video as worth anything and realize that most videos are just people talking, in which case just reading the transcript and looking at any diagrams they may have would be faster.