Works just fine in FF, but also a bit of a hog on resources? I think it'd be better if it maybe just started/stopped capturing every N minutes or even just used photos instead of video? Presumably, you can do the same analysis with just a photo?
I know it takes a lot you can increase the interval to reduce it. Good idea though, although starting and stopping of the camera can maybe be buggy/suspicious behavior. I'll definitely add it as an option.
This happened for me at first, but some combination of removing the tape from my camera and refreshing the screen, then hitting "Start Camera", caused the other button to become usable. Works well!
I don't see any errors. It also freezes up when I click to stop capturing and I have to close the tab. I tried in Incognito in case an extension was causing problems, but had same issue.