Trudat.
However, even if I posted the link, and even if the topic hadn’t been necrod, you should still evaluate things like: who operates the site, what you know about the operator, what the intentions of the operator and site are.
So I would make pessimistic assumptions: anything you download through that site, the site will make a record of the metadata relating to that, that metadata may be shared anywhere, and the site at least in theory has a permanent copy of the video.