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 True that.  I was in the working group that made activity pub.  We really pushed hard for them to follow standards on identity that would have made all of this SO much easier.  Got 80% of the way there, I think.  In retrospect, could have been better, but could have been a whole lot worse.  A decent AP / Nostr integration could help, but of course, the way things are now, folks are tribal.  Discovery can actually be quite good on AP as it theoretically inherits from Linked Data.  Not sure on the algorithm front ... isnt it just pluggable? 
 Well I’m just thinking of all the heavy lifting required for servers to actually curate and feed the data. It’s way more processing power required right? Each person would have their own algorithm. Or custom algorithms like Bluesky has where they are off on their own servers 
 But also, there’s a lot of blacklisting of whole servers in the ActivityPub world. It severely limits the *amount* of data accessible to the algorithm itself. 
 Things are evolving so fast.  A small model that runs on your phone does today what a super computer did 5 years ago.  I cant personally judge how hard or how easy this is.  Good to see people trying, and competing with more proprietary tech from my POV.  I realize that was a non-answer.  If I had to guess I would say you could do quite a bit of algorithm with commodity hardware.  Analyzing the videos may be tough tho.  But this is all coming, it's the future, someone has to be in the space.