We've all been waiting for years to see Ryan Reynolds play Deadpool in a movie, but Fox keeps dragging their feet. However, this test footage leaked recently:
As confirmed by Rob Liefeld (who'd seen it before when it was first made), that's really Ryan Reynolds doing the motion-capture for the brief scene. Clearly the real film would be live-action, not this "Matrix videogame"/"uncanny valley" style, but the idea is to give everyone a taste of what the movie's tone could be.
MAKE THIS MOVIE, FOX!