because im love a marshal art like a Parkour
no, because parkour is the art of getting from "a" to "b" faster.
The martial art you are looking for is Parkour.
yes. parkour is technicly (?) martial arts, the art of getting outta there.
Invent is probably not the best word to use. David Belle developed parkour from age 17 but it's not as though Belle simply decided to call all the elements of the art parkour collectively. Around 1997 is when it started to become popular.
I did parkour yesterday. I am doing parkour today. I will be doing parkour later on today.
The definition of parkour is individualistic, practitioners of parkour define parkour in their own way. However, all people can agree parkour is the freedom of movement.
David Belle is the founder of parkour, but no one 'made' parkour.
I would not rely on just watching parkour videos to learn parkour from. You have to be in tip-top shape to do parkour. You do not want to break anything.
Parkour can be start by run.
usually
there are no age limits in parkour