The 2nd vid I downloaded. 18.5 meg. A transcription would be maybe 2K? And I could read it at my own speed instead of having to skip back when it covered things too fast, and there could be URLs to useful stuff like papers and wiki pages (like, perhaps, to Eytzinger Binary Search which I'd never heard of).
The video added precisely nothing to a text transcript and wasted an incredible factor for bandwidth. Just.. why?