There is no Fast bow hacking in the film you gave us. He only shot you 2 times and you didn't even lose 1 heart. Plus it was hard to tell.
I have a Protection IV set on of course it wont damage me. Their is fast bow during the first 5 seconds. As soon as I zoomed in, he put fast bow on. You can see it if u look thoroughly.
Thank you for the report. The reported player has been banned. This thread as been moved to Reports - Banned.