So if I'm understanding this correctly you see a young lady on a driving lesson (although you think it may be a test) it's possible she may be feeling a little nervous, (particularly if it was a test) the instructor (although you believe he may be an examiner) appears to be indicating that she has the room to proceed past the bus. Trusting her instructor/examiner she starts to make her way very slowly forward, to be confronted by....
An idiot on a bike, gurning, gesticulating, pointing to the camera on his head and sticking himself in the way in order to get a better shot of the cars number plate. To really top off the stupidity the footage is then posted to youtube, not a taxi driver are you?