In the UK filtering between lanes is both legal, encouraged, and widely accepted on both motor bikes and bicycles

Legally speaking filtering is fine for both bicycles and motorcycles in the UK. I imagine if someone is the type to get mad at a motorcyclist doing this then they'd probably get mad at a cyclist too.

I will say that there's a massive size disparity between the two, with motorbikes capable of weighing 400kg while the average road bike is closer to 10kg. I know which one I would be more nervous about when I see it weaving by me.

If you were on a motorbike test, you'd fail it if you didn't filter. Much more dangerous to sit in traffic.

So many people inventing laws on this thread.

Outside the US, attitudes to bike riding are different. While some of the maneuovers this rider carries out are very risky, they seem like they are keeping things in check i.e. looking out for themselves.

At sections where the traffic is moving slowly, there looks to be a very reasonable effort taken to not inconvenience other drivers by cutting them off and the such... and in sections where traffic is moving fast, they appear to be riding the max speed indicated on the road (mostly 20)

The bike rider obeyed the traffic signals and executed maneuovers identical to the other motorbike riders, it feels like a stretch to imply they weren't following the rules of the road in this scenario when others are riding the same, engine and no engine.

Do consider that with a bike-mounted dashcam you can't see things like eye contact between the rider and drivers, and subtle movements indicating that the driver is aware of the bike rider's presence. The type of lens used on these dashcams also distorts things greatly, making things appear closer or further than they actually are

Jesus, that's a bit rough. I mean, the death stuff - why say that? I understand you're being hyperbolic but - again - why put that out there? Noone deserves to die for riding through traffic, what a thing to say...

Filtering is legal and encouraged in the UK. There are cycling UK videos showing this technique as best practice. Please don't bring your US centric views to a UK video if you don't understand our laws

Those are the rules of the road. Cyclists (pedal or motor) are not supposed to sit in traffic, they're supposed to get ahead of it as quickly as possible.

So you think cars create a dangerous and inhospitable environment unsuitable for humans? I think we can agree on that point.

It's actually safer and other drivers knowing this kind of behavior is encouraged and legal are more aware of it. Filtering is legal and encouraged simply because all the squishy traffic participants pile up in front of everyone where they are clearly visible. No possibility of being rear ended by someone looking at their phone and not seeing big enough target with corner of their eye.