Professional mechanic should be responsible for checking bus safety daily but bus 长 should double check too, which is awesome! Maybe more double check procedure would be safer?
The music that can be heard for example at 1:27, 1:32, 1:44, 1:51, 2:03, 2:35, 2:47, 2:51, 3:07, and 3:19 sounds like someone panting really fast. That cracks me up.