Youtube Doubler

In case there's people who don't know about this, it helps a lot to show the similarities/differences in your work. For instance, here is my video back to back with the clip i took it from http://www.youtubedoubler.com/?video1=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D4sKgBRElEbw&start1=0&video2=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D_ZQIeqLVabA&start2=0&authorName=Real