If you want to post Youtube videos, you've got to use the address from the actual address bar, not the shortened link they give you if you click on that "Share" button.
I could probably just post about any of Bad Lip Reading's videos (which are kind of like Literal Music Videos but instead feature completely re-written music and lyrics that sync over the video(s)) Their most recent was Morning Dew "by" Bruno Mars, featuring Jay-Z and Lady Gaga (which used video samples of The Lazy Song, Empire State of Mind and Alejandro)
They've done others featuring Taylor Swift (ft. Wiz Khalifa), Michael Buble, Ludacris (ft. The Bee Gees) and some others. To me they're hilarious (and pretty catchy, too).
That's the alternate video, the other one is him running with the kid and old guy. That whole record is pretty good; the Flaming Lips helped him make it.