The problem is evaluating a candidate. For that, one likely needs to do some live-coding in some capacity along with several other things. While the existing tools are subpar, they are good enough. The hard part is what questions to ask and how to go about judging the answers as to produce a good hiring signal without alienating candidates.
You can tell that remoteinterview is trying to address the real problem from their marketing copy. However, I am highly skeptical that giving team members the ability to up and down vote with comments on an etherpad + video is a big chunk of it or even an "in".
If I were working in this space I would only worry about how to produce evaluation materials given some information about a company and a candidate. It very well may be that it is not easy enough or possible to do that at scale or cost-effectively, but that seems to be the thing companies struggle with, not having to use skype.