Isn't this video pretty old?
As for racing as far as i am concerned it's clean as long as there's no intentional touching.
There's nothing wrong if you block once from your normal line.
But if you purposely do a pit manouver, pushing someone off or brake test then its definitely a black flag.
So if those cannot stomach close quarter racing without touching may reconsider the thought of racing in categories like SNF, S2k, MME, MSS. Not to worry, there's always karma..
My judgement/ opinion on this video... It's car racing Thailand style. So the driver should just stick to kililng themselves in the muay thai ring and not on the track...