Screw you both. If every video someone has seen before gets 1 starred, people are going to stop posting awesome videos worrying too much about dupes. This is my first time seeing it, and I wouldn't have found it on the site otherwise, so 5 stars.
Dupiest dupe to ever dupe dupetown, but 4 stars because I always love seeing how a cat's "point legs in the direction you're falling" instinct becomes a self-destructing feedback loop at 0g.