> There is no mechanism whatsoever on youtube to incrementally improve a video or understanding of a topic.

Yes there is? You've been able to trim and append end screens for years. Usually when understanding on a topic changes people upload newer videos.

Do you expect the books on your shelf to update every year? What a baffling relationship with media you must have.

> Youtube does not reward or otherwise provide provenance and incremental improvement.

I don't think that Wikipedia rewards provenance either? The "reward" seems to be seeing your own beliefs put to text. I suppose that's what you're getting at?