Q: Is a short cellphone video of me holding what appears to be a shotgun enough to convict me in a criminal court?

A: Being in possession or control a firearm is sufficient to support a charge of PC 29800 (felon w/firearm).

Given what you described, you got duped by a couple of con artists. The video may provide evidence that the shotgun was, in fact a replica, in which case you aren't guilty of the offense. It may take a forensic expert in breaking down the video frame by frame to prove it but you have to decide if the cost is worth more than serving up to 3 years of jail time.

The recording of the "tip" by this couple to the police may also provide useful info as to their identities as they sound like they're pro's at taking advantage of ex-felons and, who knows, there might be open investigation of similar incidents by them.

I suggest consulting with or hiring a new attorney before taking the plea deal.

A: more info needed.

is there any other evidence of you with a shotgun?

can you prove it was a replica?

the phone call you?? made to the police, may be helpful in proving your story?

often lawyers suggest pleas, which when balanced against a conviction, make sense at the time.......but not always.

A: First, as general matter, video evidence is obviously very strong evidence - whether it is being used to prove or disprove the charges. In your case, if the gun is a replica as you say, the video may be helpful in proving that. Conversely, it could provide evidence of your possession of a firearm. Bottom line, you need to consult with an attorney to review the strength of the evidence and decide on a litigation strategy.