Oh come on!
That's not parkour! I'm 55 but I could easily do everything in that video except the backflips at the end. I'll bet I'll be able to do it when I'm 75. That stuff was hardly more difficult than walking on stairs.
As for real parkour, I'll bet I could learn it in a month (when I was younger) if when I fall and break my leg I could have a new leg attached and be back at it 20 minutes later. The reason it takes humans longer than a month to master is because if they get hurt they may need weeks or even months of healing before they can get back at it.
If you were freed of any concern for pain or injury, you could learn parkour quite quickly. Given that it took a month to teach these robots to do nothing most of us can't do other than the backflip, how long would it take for them to learn REAL parkour? How much longer to do it dynamically rather than repeating the same pattern?
We certainly don't need to fear being chased on rooftops by these "terminators". They'd be lost if faced with a roof they hadn't spent a month training on!