I hear you. While it may be impossible to stop the tracking or the fingerprinting, I follow the steps below to somewhat limit the damage from the cesspool that is Youtube.
- No Youtube Kids app
- I use the iPhone app on which I have a setting to "Pause Watch History" and "Pause Search History"
- Clear the watch history once my son is finished viewing( this is weird I know considering the above setting but I've found it helps )
- I stream the video to the TV so that my kid doesn't keep swiping on random crap
- I and my wife have a plan to wean him off Youtube by making him watch something like NatGeo on TV.
Edit: formatting.