Originally Posted by TheLegacy

If you're talking about your own porn videos that you have all the doc's for then watermarking only helps to a certain extent. Smart tubers or site owners can re-edit and cover your watermark with theirs or simply zoom in and copy the video without your watermark. There are codes you can use to track your stuff but you'll still find that some tubes out there don't even care and just steal videos - upload them even with watermark and run them. The real owner has to jump through hoops and spend money with lawyers to get it taken down - but that's if the tube owner cares.

if you're stealing it then shame on you and don't do it. People worked hard for that movie only to have you profit from it.