"The party does not believe it, why should we seek investigation?" TMC secretary-general Partha Chatterjee said when asked why his party was not seeking investigation into the sting video.
"We had faced many conspiracies. We have the strength to counter it. We have confidence in ourselves," he said.
The sting video, released by a news portal, purportedly showed TMC leaders accepting money to help a fictitious private firm.
"The opposition parties' only agenda is to launch smear campaign against the chief minister and attack Trinamool Congress," he asserted.
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Earlier, TMC vice-president Mukul Roy had described it as a "doctored and manufactured" video.
Meanwhile, Mishra, also CPI-M state secretary, in a tweet said, "What's stopping d CM to test d video footage which her party claims 2 b 'doctored'? She&her party has lost all moral right 2 rule. Oust TMC (sic)," Mishra tweeted.
"There is no other way but to take to the street," LF chairman Biman Bose said.