The clip shows comedian Gavin McInnes using his own child to demonstrate fake fight moves - a combination of rough housing and cuddles.
The father is seen jokingly demonstrating the giggling baby's weaknesses.
"This is a very little known technique for fighting babies – their Achilles heel is wind," Gavin says, as he blows in the child's face.
It has already had over nearly 3 million views on YouTube, but many of the comments accused Gavin of cruelty.
One, Ronald Book, said: "This is child abuse. Disgusting human being trying to make money off of hurting children."
Another, Kevin Price, added: "You can damage you baby's brain throwing or shaking him like that what is wrong with you!!!"
But some disagreed, insisting that the angry viewers were overreacting and that Scottish-Canadian Gavin and the baby are just having fun together.
One, Mormegil2, wrote: "This is awesome, I'm a man, and that's how I play with my kid.
"Women are obsessed with the sissifying of their male children these days; I know they've probably been crucifying this video, but there is absolutely nothing wrong with a competent man playing rough with his child."
Cloudsevenk added: "This guy is legend! As a father I am happy to see how much he loves his son and plays with him! Way to go dad! I prefer the grab wind in face then body slam combo followed up by a forehead to forehead screaming match hahahaha"
And fulcoboy added: "You can clearly read all the people who don't have children...
"I do this all the time with my girl and she loves it! If you believe that a baby laughs when it is in pain I would wait a little longer to get children!
"I applaud this dude for having such a great relationship with his kid!!"
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