I designed this adjustable and versatile arm for my Sidewinder X1 but it should work on most similar Ender/Prusa style printers. It can be screwed to the Z axis aluminium profile. The webcam can be mounted horizontally or vertically.
You can even make your own little camera adapter instead of the one I made for my C270 (Part E). It should also work with many other printers that use 2020 aluminium profiles.
Use the file "Everything.stl" to have everything in order and in the correct printing orientation.
No supports needed.
Additional things you need:
1x M3x8
2x M3x10 (M3x8 might work just as well)
2x M4x12 (M4x10 might work just as well)
1x M3x12 (to attach the C270)
1x Screw that fits into one of the holes in the z axis profile (I just used a stainless steel wood screw)
The author hasn't provided the model origin yet.