I’d also consider using a smaller card if you have that available. Although Wyze recommends using a 32 GB microSD card formatted FAT32, some users testing the current RTSP β firmware for Cam v3 and Cam Pan v3 have reported better success with flashing when using smaller cards (ranging from 8 GB to 512 MB; begin reading at this post).
I think that’s a fair question, and I don’t know the answer, but I would expect the steps for reverting from a webcam back to a normal Cam to be the same as those for reverting a Car Cam, which is basically the normal flashing instructions.
I’m still wondering how a Cam v3 was used as a webcam with Wyze firmware, because—as @Seapup noted—I didn’t think Wyze made webcam firmware available for that model. 
Welcome to the Forum, @Joe29! 