Bit daft overtaking a vehicle on public highway then slamming brakes on to warm tyres. While it might need to be done to warm brakes tyres etc, some appear not to be considerate to other road users.
In that YouTube clip towards the end of the video is a tocsport Skoda that slams brakes on quite hard, Vauxhall insignia travelling behind brakes so hard the rear brake lights flash indicating heavy braking warning to following traffic. Driver of Vauxhall appears to take avoiding action by veering to the left, with an oncoming vehicle heading towards him.
A rally fan may be aware of this tyre warming procedure, Regular road users not so much.