A few times when I have opened a thread I have had a video open almost full screen in front of the posts. This time around trying to close it the video has moved to the left of the screen after close it and I have ended up in Facebook.

Just tried to read another thread and I had a full screen advert with a video embedded inside for Nivea shaving products - because the advert was full screen I had to abandon the site and close the browser due to the controls for closing the advert not being visible.
 
I understand the need for adverts but is it possible to make them less intrusive?