Safari 7.1, OS X 10.9.5 I've begun to notice more and more web videos that I can't block at all. Some of them seem to be high-quality GIFs, but others I can't identify. I have Silverlight installed, but both it and the built-in Quicktime plugin are set to, "Ask" in Safari's preferences, with no websites set as exceptions. Adobe Flash is not installed. One in particular is currently being used on Kickstarter's home page under the heading, "Bring creative projects to life". My basic skill with the Inspect Element tool seems to suggest it may have something to do with Adobe Flex. Can someone help me what type of video element this is so that I can block it?