URL.createObjectURL is deprecated for media streams.
It will likely be removed from Chrome in version 69, Sept 2018.
It will be removed from Firefox in version 62, Sept 2018.
It is already not supported in Safari.
The replacement is assigning the stream directly to srcObject. This does bump up the minimum browser version. If older browser version support is required, either user agent detection or fallback (TypeError from createObjectURL?) will need to be done.