Actually the markings in the center of the road only disappear briefly, when he's hit the slashed lines appear again so there was probably just a section where the paint had worn out.
Also, this looks like the UK so maybe those line markings are for a 'shared' centre lane like we have here for turning left off out of the flow of traffic? Except in this vid it would be for right turns. If it is a right turn 'exiting' lane then the biker had a right to be there he just should have been more careful about passing cars, and the driver should have looked for traffic coming up behind before moving into the lane. Even the biker did his shoulder check before moving over.
My 2c.