I know previous versions of RhoMobile didn't support it, but I'm not sure about the latest version
No, actually the latest version doesn't support the video capability either. Sorry!
The official line is we are looking to support video capture in the not too distant future but we are not able to commit to a date on this feature yet. It is not in the current release and is unlikely to be in the next release, due in the July/August time frame.