Here, for what it's worth, is the response I received after forwarding the video to the MTA:
We received your complaint regarding a bus operator. We apologize for our bus operator?s actions.
MTA New York City Transit is committed to providing safe, courteous, reliable, and accessible bus service. Our training programs for bus operators are designed to instill high standards of professional conduct and safe operation. The behavior you described is not representative of those standards.
Thank you for bringing this matter to our attention.
Sincerely,
Ivy Taradash
Senior Customer Service Associate
MTA