Great job. I'm glad to hear a fresh voice on RU-vid, with a fresh idea for printing on fabric (not just the typical dragon scales). I immediately thought how nice it would be to incorporate this into a custom crochet or knitted project. Keep up the work, and good luck with your channel.
I have tried something real similar and the plastic ALWAYS came off the fabric but later what i did is i would print a few layers, then put the fabric down and make suee to use a fabric like what u used... then id offset my z slightly and then print more layers on top. Oh it seems u did the same thing i saw after i watched the rest I also done this with tshirts by cutting some small holes in the shirt, well poking a pencil through. I used tpe on those which actually bonded to polyester pretty good
I think the mesh can be pretty fine. I've experimented with different sizes and as long as the filament has "holes" in the mesh to print through and adhere to the layer beneath the mesh it seems to work:)