Tbh, I don't know if she was drunk and that's why she threw such a weak misguided punch since some people are naturally more bold and brazen when drunk.
And I partially agree that he used a lot of force, but I mean, she did try him 3 times until he finally broke. In that confined area, what was he to do after getting punched? Push her back into more people so she could continue wailing on him? Throw her over the counter? Like, he retailed back with a hit because she hit him first, multiple times.
At the beginning of the video, she is in his ear about something and then he says something back, then goes to completely ignoring her until she clocked her shoulders back forcing him back. She literally provoked this situation