Never mind, resolved it myself
There's a bit of jigging around with Chrome to get it to recognise the correct camera and microphone - it seems the WebRTC cam bit can randomly decide which camera to get. Once I sorted this though, I was able to achieve what I stated above.
In short, you need to enter the following URL:
chrome://settings/content/camera or
chrome://settings/content/microphone
To override/correct the settings if F4F picks the wrong one when prompted. I had to clear site settings a few times, but got there in the end!
Cheers,
Xav.
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