i have an ad blocker on my desktop so i never see them. as far as i know the adverts are particular to this isp and the others dont do that, but all of them block more or less the same amount of websites. this is actually one of the largest providers in the country too.
in terms of content of those ads they are largely the government line about the ukraine conflict and some other affairs. i dont think ive seen the typical 2010s pop culture bait ads. the videos tend to be some store advertisements like leroy merlin.