Heyo, So cricket container is infested with these, wondering what they are and if they are safe for beardies?.. it looks like a long hairy isopod that does not curl into a ball. around the same size.
Looks like a Dermestid Beetle Larvae. They are a common cleaner larva used in bug colonies. Beardie "can" eat them but they basically eat the insect waste so I'd avoid it.
I would also guess Dermestid Beetle Larvae, like Brandon said. They're used as a cleanup crew for insect cages as they eat old molts, dead insects, and decaying organics in general. They're not toxic for your beardie, but also not ideal as they're basically gutloaded with all the yucky waste from your feeders.
It would be a little easier to tell for sure with a slightly different picture, but you can google the dermestids online and see if they look like what you have.
A good cheat for insect pictures though is to put a coin in the picture - they're a standardized size and make it much easier to tell what size bug we're looking at for identification. Another hack is to try to get a good picture of the "face" of the bug, particularly the mouth parts.