This is not permissible and it is an innovation

What about collective takbir in Bayram salah like this – http://www.youtube.com/watch?v=VzuCM0tZTHU Here this is normal is it sunnah or bidat?

Innovations | March 1, 2014 6:56 am
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Many say that a person who dies in the holy month of ramadaan is entered in jannah without any question n answer?
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Recite the Kalima, so that it reaches them in their graves and benefits them (is a way for their maghfirah)