can anyone tell me what i can use that's the size of a GoPro and can live stream to OBS or similarly work as a wireless webcam and costs less than a hundred pounds or doesn't need a monthly subscription to do so 
@mavica_again Your cellphone, NDI camera app and NDI plugin in OBS. I've streamed with 3 camera rig foe years and it's made of old phones.
The image quality is fantastic, depending on the phone and the lag is minimal.
@apzpins my phone sadly is not the size of a gopro and it does not have a tripod screw mount (cheap spring-loaded finger traps that accidentally hold down the power button half the time do not count)
@mavica_again Shame, I experimented with a lot of different wireless and wired solutions for a use case where the PC is 5-15 meters from the camera rig and the phones beat everything each time.
@apzpins also i would like a camera that does not spend battery into heat through the incessant wheelspinning of android