Wing Chun vs. "Muay Thai"

FROM THE VIDEO UPLOADER:

In brief the story goes like this. The smaller stockier guy has been badmouthing all wing chun lineages proclaiming himself the number one italian exponent of William Cheung. and claims he ttrains 8 hours a day for the past 20 years.... he's been going on like this for about 3 years also claiming he had already defeated notable wing chun wing tsun ving tsun masters etc etc etc...
also he claimed he beat up and he could take on MMA fighters and in this case he claimed that the opponent he fought (if we would like to call it a fight) he would defeat him in 5 seconds with one hand...