In the 1930's western film studios typified caricatures of what they think Orientals must be like, using Caucasian actors to play the roles of Fu Manchu and Charlie Chan. India has about 1,900 dialects and many ethnic groups, it may be inaccurate to template a typical Indian body language. So this video may run the same risk.
Do they claim to represent all Indians of your mentioned sub groups and whatnot? Secondly: even if India has these mentioned variety of sub groups there are still some similarities and commonly shared characteristics in expression. Even if they are not shared by all, it is unlikely that it will cause insult and uproar if a shaking of head is done outside its 'standard habitat'.
Last but not least: Please bear in mind the humorous connotation of the video. In case you missed this part: it is the broad grinning and smiling in the men's facial region that strongly indicates the humorous nature of their work.
Taking the video as its presented in humor... Its funny.
But India has more than just dialects its totally different languages.. Different scripts, grammar and cultures... The head wobble presented here is mostly for South Indian states... You certainly wont see it if you go up north, west or east.. Just my 2 cents
Although this is KPT, this is still a public forum that can b viewed by all.. just wanna remind that comment should b sensitive to our fellow Indian CSer n public.. any inference to a specific race Shld be taken with care. I do not have an issue with ur statement But misunderstood intentions may leads to negativity by others.. just saying..