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I've used DroidCam with mostly good results. (I think the last time I tried it out wouldn't work but previously it had worked well)

Droidcam pro was excellent to me.

Worked for me too!

The only downside was (on Arch) having to recompile to update the v4l2loopback_dc kernel module after ever kernel update.

I've since moved on to a regular webcam though.