I've seen a lot of threads about lane splitting over the years, it seems like most people that are against it, don't like it because it makes you ride like an idiot. The guy in the video would ride like an idiot whether lane splitting were legal or not.
If it were legal here, I most definitely would do it, mostly to keep ahead of traffic and out of danger. The problem is too many people see it as a reason to ride like an idiot, so it won't ever be legal here.
The problem is that being ahead of traffic is not the safest place to be, it's actually one of the least safest places.
The last thing you want to do is be the first vehicle through an intersection, the last thing you want to do is set yourself up to go through the next intersection without an escort, the last place you want to be at the next traffic light is right in front of the last person you pissed off.
I don't have any issue with you or anyone else who chooses to split but to do it for "safety", you are misleading yourself and others.
The "safety" argument for splitting has always been to avoid getting rearended, it's a valid concern, being rearended is the thrid most common type of motorcycle accident, but the second most common type of accident is getting encroached from the side at intersections and crossroads.
So if you want to split, do it to save time, keep the bike or yourself from overheating or just for convenience, but don't fool yourself into thinking it's for "safety".