Go to where the video or pic is and right click on it. You will get a menu of either a link or a URL. Like, copy this URL address. You want to copy that and paste it here either in the link or url thingie above ^^^ link is the earth with a link in front, the pic is a mountain with sun ^^^ Paste it with that and it should work.
OOPSIE! The above "^^^" is when you are typing, not reading.