The pea thing is mainly for bigger fish. Did you boil it so it's soft, was it a garden pea and did you chop it finely enough for a firefish?
If it's still eating, it can't be be critical yet surely? If it's a digestive blockage, it'd stop stop eating just like we lose our apatite if constipated and bloated.
It's not about to wipe the tank out, even if the fish dies, it'll just be consumed by CUC, it won't cause any harm.
Videos are best uploaded to youtube, they're far too big for us to handle plus we don't have a player for them. A 20 second clip from a modern phone can be well over 100MB.
Are you saying it's belly is ruptured?