This makes sure the library version works with the server version.

Ideally we'd also want to check the version so we can error out if a too
old keycloak server is on the other side, but I don't see any public API changes
that would allow us to know if the library is too old.

Fixes #32

See #32

Handle the case of no video device being found

See merge request !3

In my case it was ":1", making ffmpeg fail to record the screen.

I couldn't find any breaking changes affecting us

Instead of throwing an error set activeCamera to its initial value.

It's a webpack plugin, so unlikely that it is used.