Yet another video that shows the importance of safety systems and having the right training to use them and understand them.
I'm assuming he was in suicide mode as the initial release obviously didn't flag the kite. Then we can see that his safety leash is attached to back of the harness, making it difficult to reach and also dragging him backward.
From the moment he started to get dragged the second time and then ends up in the car park there are roughly 1 to 2 seconds where he could've release the whole kite. The question is, would most kiters be able to release a kite this fast in a panic situation? The answer is probably NO.
The lessons to learn from this are:
-If you choose to ride in suicide mode, understand that releasing your safety won't flag your kite unless you are connecting yourself with this kind of setup :

-It's best to avoid connecting your safety leash at the back of your harness. It makes it more difficult to reach in an emergency situation. If you never unhook like 80% + of kiters, it's much safer to get a short leash and attach it to the front of the harness. There are still a TON of kiters who never unhook with long leashes attached to the back of their harness....no wonder as most students are still taught to do it like this.
-Get some training in releasing the kite completely in fake panic situations. This was probably never done during your lessons and could be the difference between life and death. Knowing how the final release works and when to use it is one thing, but being able to
use it quickly in a panic situation is a completely different story.
When teaching lessons, I will yank on the front lines (kite is not flying) or the safety leash out of nowhere (kite is not flying) to see how quickly my students react. Initially, the reaction will be slow or non-existent, but after a few trials, it becomes second nature.

That is critical training that is often completely overlooked...Next time you go kiting with your friends pull hard on their safety leash out of nowhere (while not flying a kite) and see how quickly they react.
Christian