Can I change my dad’s disgusting YouTube algorithm without him knowing? Would it work? Help with conspiracy theorist dad

Recently moved back in with my parents after a horrible breakup. My dad is autistic and his special interests have always been conspiracy theories but as the years progressed they have gotten more and more disturbing. He sits and watches disgusting YouTube videos literally ALL DAY LONG. The Holocaust wasn’t real, school shootings arent real, the “Jews” are running the world” most true crime isn’t real, nothing that is happening on the news is real, white men are the most oppressed group, it goes on forever and he never shuts up about it and it’s infuriating. I want to change his YouTube so he’s exposed to funny videos and good news and uplifting stuff and cat videos. Anything to get him out of these holes listening to these red pill freaks.

Any ideas on what I can do or how I can deal with this?