[account42]

I'd expect the notice to be on the same screen where the ad or ad-like content is shown if the regulation intends to actually make a difference.

[HWR_14]

So you expect the movie to pause for a disclaimer?

[Jensson]

I think he would expect the movie to not feature undisclosed ads everywhere, if those ads would ruin the movie then the movie shouldn't have any.

[demurgos]

It could also be a pop-up or a clear icon in a corner without disrupting the movie. It does not have to be baked into the video stream as long as it's displayed. I'm not sure what country you're in but some programs on TV or YouTube use this system and it's fine. No need to pause with flashing lights.