I agree with Howard #6
The lady who said "there was no need for that" spoke after the lad was ejected and when the lad was trying to get back on. That comment could have referred to anything and might have had nothing to do with the incident.
Yes Paul the altercation and abuse had been going on for a while that was why the man started filming.
I hope the passenger gets away with it if it ever reaches court although I guess Tom will disagree with the last sentence.