Little bugs in tank

[FrogLoving17]

Hi FF! Just tonight whenever i went and fed mr.jelly i found little bugs crawling on his huge log. This has happened 3 or 4 times before and they go away but i would like to know what they are! I believe they are baby crickets. I was recently gone and had a friend give him crickets. Usually when i feed him i make sure he eats the cricket asap but i have a feeling that my friend just threw them in there and that there were some crickets that may have mated. I have not changed the coco fiber in 5 months(don't worry i do clean out all feces) I have already planned to replace coco fiber and do a deep cleaning asap! Please tell me if they look harmful to my frog thanks! (Whites tree frog in a 12x12x18, healthy frog never been sick only fed large crickets)

I was able to get a video of these bugs bug ff will not allow me to post