It looks like https://www.youtube.com/@EffectiveAltruismOfficial (which used to be https://www.youtube.com/c/EffectiveAltruismVideos ) unlisted almost all of their videos, including e.g. Ajeya Cotra's classic introduction to EA
Does anyone know who to reach out to to ask if this was intentional?

Bill Gates just endorsed GiveWell!
I don't know how much we should update on this, but I'm now personally a bit less concerned about the "self-recommending" issues of EA resources being mostly recommended by people in the EA social community.[1]
I think this is a good sign for the effective giving ecosystem, and will make my relatives much less worried about how I spend my money.
Not that I was super concerned after digging deeper into things in the past year, but I remember being really concerned about it ~2 years ago, and most people don't have that much time to look into things.
I am confused as to why he doesn't give $1bn a year to GiveWell, but I guess let's wait a year and see if that happens.
I don't think his foundations really does marketing for donations. My guess is that from his point of view, he thinks it's preferable - but that he thinks GiveWell could be a good fit as a donation target to many audience members.
That's fantastic!! Great to see, thanks for sharing!