for each possible advertisement or streams that in relate with marketing but as a viewer/fan then we arent that dumb on not to notice things or could really make out some verification
first before do making some such step because we do have our own self will on doing things and not needed for some sort of those extras.
Man, i had seen drug advertisement on youtube few years ago
Here it, news about this case, but in russian (you need to translate a little bit) -
https://vc.ru/flood/25751-youtube-hydraSo it's weird to ask Youtube for moderating of gambling advertisement in video, if it can't properly moderate it's own video prerolls

And i think, that Youtube do not want to moderate it.
So, all hopes for the regulations. We are not having one supreme leader for all countries around the world, so regulations can be different in different places, and, I'm pretty, sure, there will always be countries with no regulations at all. I mean, we can't count on regulations to come one day and save us, because this may never happen. We have to save ourselves through our own means, and we have to it today. It's easy: don't watch those videos if you feel vulnerable.