Everyday I get a load of YouTube stuff popping up on my home page. TBH there has never seemed to be any rhyme or reason for the subjects (chalk and cheese) they appear to be random. Although, if I've been watching something, other similar things get presented in a section of it.
I think you will find that they are some how linked to the subjects you previously accessed. I have been watching 'Car Crashes in Russia' as entertainment ...... unbelievable ..... makes the driving here look impeccable or maybe Russians all have dash cams, but the next evening I get links to the same sort of sites. Amazing what they can fathom out from what you type in all innocence. If Putin ever notices ..... I could get The Kremlin Medal of Honour for services to Russia and I promise to invite you to the presentation!!!!