That CGI gag was done by Corridor Digital, not Boston Dynamics.
That's a great channel, I really like their "reacts" series that comes out every Saturday. They also had a good one from Sunday about the Pentagon UFO videos.
Have you seen the behind the scenes video? https://www.youtube.com/watch?v=EezdinoG4mk
That provides some great context, but I couldn't help finding it a little unsettling at 03:09 when one of the robots is suspended off the ground and "bleeding" a pink fluid onto the mat beneath it.
1. [EDIT: IGNORE THIS POINT] They've done this before. [1]
2. To get more specific, look at the robot's legs around 0:09-0:16. They don't seem to be moving normally.
I don't have professional video analysis chops, but I'd put some money on this being fake.
Happy be to be proven wrong, though.
EDIT: It appears I remembered this story incorrectly, and posted a link without reading it. I retract my first statement. I'll leave the link for posterity, though.
[1] https://www.theverge.com/tldr/2019/6/17/18681682/boston-dyna...