Flash animation is the standard for Internet video. Videos on YouTube and other websites use SWF (.swf) files, which are the Web-optimized output of Flash (.fla) files. An SWF file in and of itself cannot be edited. It is akin to a Photoshop (.psd) file that has been flattened to a .jpg, .gif or .pdf file made from an Acrobat file. The only guaranteed way to edit an SWF file is to have access to its original Flash file. Third party decompilers can do some of the conversion, but they do not successfully convert all Flash elements as well as Adobe Flash.