Ugh!!!
Deft, That was an answer.
What you seem to be failing to see, after WAY too many people have spent WAYY too much time trying to explain to someone wh0o seems blind and deaf to reason and answers is that you are asking a "setup" question.
Do you walk to school or carry your lunch, give me a straight answer.
Do you really enjoy wearing your mom's shoes? Give me a straight answer.
"Some of those skills are defiantly part of freestyle pk" - Quote from Deft.
What this shows is you still don't get it, you are so hung up on the idea of "Freestyle Parkour" that you can't see your own hand in front of your face.
If someone from VA-Parkour does a flip it WILL NEVER BE FREESTYLE PARKOUR to anyone other than you and MLW, the last two people in the universe to be stuck on that term.
So, you are welcome to see it that way , to call it whatever you want, to dance around in your sister's underwear and call it Freestyle parkour, but it still won't get an answer to your question!!!!
The answer to your question is this: Not a valid question.
What you are trying to ask is "How can someone tell the difference between when you're doing Parkour in a video and when you're doing other movements.
The answer is this: In order to tell the difference, they have to know what Parkour is.
If a baseball player in the middle of a game started kicking a soccer ball around, you would know that the baseball player was no longer playing baseball, they were now playing soccer, this is because you understand the difference between baseball and soccer.
Therefore, until you understand the difference between Parkour and other things (anyhting NOT parkour) then you will not know when someone is doing something "not parkour" in a video.
However, if you look at the many readily available definitions of Parkour, for example the FIRST thing on the APK homepage, or the one form PAWA, or the one from Parkour.net, then you will know what Parkour is, and you will be able to recognize when somehting is not parkour. It's really not very hard, but you seem to be persistent.
I really don't expect this to clear it up for you, as this is just one of many hours spent for your benefit trying to educate you, but alas I remain hopeful and trying to be helpful!