Join Date: Dec 2014
Location: Northern California
I may be wrong about this, but as far as I know this site does not support direct uploading of videos, only pictures. So videos that you are watching, even though it looks like they are playing "in site" are embedded links to some place that does like YouTube or Vimeo. The first step then is in understanding what you are watching, where it is from, and whether the ads are from the host site, probably before you bug the support team.
That said, if after due diligence it still looks weird, then go ahead.
Edit: I stand corrected. Looks like the drag and drop box does support video type files. Still, betting most ads are from the embedded links.