The best way to tune the algorithm on Youtube is to aggressively prune your watch/search history.
Even just one “stereotypical” video can cause your recommendations to go to shit.

It’s never been customary to adhere to KISS in Linux. This whole explanation reads like it came out of a game of Chinese whispers.

does not comply with the principle of K.I.S.S. One application should solve one task and can be replaced

That’s not KISS, but the UNIX principle. And even that part is wrong, as in traditional UNIXes applications were certainly not replaceable.

Twitter probably opened the floodgates when they managed to shaft users and cut API access without outright killing themselves. Now everyone else is emboldened to ask “why can’t we do that too?”.