I liked how you failed to realise this bus is way faster than your regular MAN busses and had to do ridiculous stoping. Regardless great video 10/10 would watch it again :D
Update to the newest patch, reduce visibility distance, object and map complexity, use low resolution textures. You have to play with the settings to get to the point where you have stable 25-30 FPS and the game still looks good. More graphics optimizations coming this year with OMSI 2.