I absolutely hate this. Scanning a video is so much more difficult than just scanning a written explanation. If these videos are being monetized, I think that's a problem. If they are, someone could just create a channel by converting SO questions into videos.
The question I have is what kind of keywords are people using on these videos that Google feel is more worthwhile than the actual text of a written version of the content? Or is the algo so heavily weighted to pick a youtube link?