QuickTime stop default open downloaded video's
Every time I download a video or movie Quick time stops me doing whatever I am wanting to do and starts to process the downloaded file. How to stop this happening?
If no one knows how, then how can I delete QuickTime from the face of my Mac?
MacOS10.11.6
MacbookPro Retina
MacBook Pro with Retina display, OS X El Capitan (10.11.6)