Let me introduce you to them -
The inital guy is Mr. Rishabh Shukkla, the voice actor of Lord Voldemort.
Next is Karan Trivedi, the voice actor of Harry Potter.
Then is (left) Nachiket Dighe, voice actor of Ron Weasley.
Then from right is (slightly old looking with moustache) Dilip Sinha, voice of Hagrid.
And far... right is Parignya Pandya our Hermione Granger.
There is a beautiful post at Indian Express , if you have time, you can read their bio and interview.
ON A BIG NOTE, THIS IS 101th POST OF MUGGLE INDIA! HURREY!!