That's not a scripted death, that's abuse of crafting, genius.
Sorry, but no. Hanging out, in the world, and (skill) leveling up, doesn't change the fact that dragons, while perched, have the same scripted death as a dragon in flight. (hence why the dragon takes to flight, clearly, after it should be dead)
@ the time of that vid, There was 218 hours logged in game time.
When you add the right buffs (I used The Thief Stone/The Lover Stone/other various ones when needed to level)...
There is no reason at all to abuse the mechanics. It's just not called for. Just a tip.
/edit
And yes @ Sokar, I've been gypped at least 10x where a (dead)dragon has not rendered it's soul to me.