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.