I’ll be completely honest here that we’re not 100% sure WHAT this is. Based on what was shared at Las Vegas Comic Con last year and the “Deadpool” script, this seems to match the test footage that was described. There’s also the fact that Fox pulled the YouTube video within hours of its posting.
Whatever this is, it’s pretty damn cool, and I would suggest watching it as soon as possible before Fox takes this video down as well.
Thanks to the guys over at Super Hero Report for first bringing this to our attention.