Job boards are broken, and this is a good step in the right direction, and I wish them the best.
I would caution though against not looking at the discrimination piece head on, and addressing it clearly.
The reality is, video interviews do make it much easier, and less costly to discriminate, and easier to hide it. People who have been targets of discrimination might be less hesitant to use them. This might skew the candidate base...etc.
I don't have any good ideas about how to address this, and I'm excited about these guys making a dent in how we hire, but I do not think you can take more than a few steps in this direction without directly addressing its possible (and probable) misuse.
But as Bruce Schneier often says, technology makes it easier for the bad guys to be bad; that doesn't mean the technology itself is bad.
If a company discriminate based on race, they will get the kind of performance they deserve.
There are specific, legal, questions you could ask which would be ok ("how many years of experience do you have with bras?", various technical questions, etc.) which might correlate highly with certain physical characteristics.
I think there is a moral argument against discrimination on these grounds, but there's also an argument for letting companies make their own decisions.
Even without legal prohibitions on discrimination, I wouldn't want to create a workplace where this kind of discrimination happened -- even if it were good for a specific job, it would also drive away other candidates for other jobs, and I think the net loss would be greater.