What is a watermark on a video?
Title:  Branding with Watermark
Watermarks can be seen on the lower-right portion of videos.  It gives viewers instant information on the source of the video or even its makers. It can also generate traffic on your site or videos by branding them.  Watermarks are semi-transparent images that are superimposed on videos.  Encoders and capture cards can now “burn” these watermarks on encoded videos.  But once you have done it, there is now way to “un-burn” or remove it.  One good example of watermark is the kind which lights up when the mouse is passed over it.  This is the video owner’s choice whether to add more features so as to make watermarks more appealing to viewers.