The ads on Youtube on my Samsung have recently become super aggressive.

- 2x 10-20sec at the beginning of every video (even e.g. 30sec clips)

- Then, usually 2mins in the Yt themselves do an ad

- After that, at around 3mins, another 2x 10-20sec ad block.

I've started to work actively against it now since my viewing experience is suffering. I have a pihole but it doesn't do much.