Bad writing too. If he wanted it to be believable he should have left out the crap about his friend's ashes.

There's also the text at the beginning saying he didn't think he'd have the courage to share the footage, but then he ends up sharing something that he had to have spent a lot of time editing? If it was that traumatic, surely he wouldn't be able to have put that much effort into editing it like that. It's not like all cutting between all those angles was necessary to demonstrate that a parachute is handy.

That was the main giveaway for me too. Sure there are lots of technical things that give it away, but this man couldn't act to save his life. When he first reached the tree with his parachute, I couldn't help but burst out laughing at his "anger".