Besides it doesn't look like they are primarily focused on selling the device itself.
For a device to work for us it would either have to be so small it can be worn with a hard hat, and not stick out beyond the helmet and incorporate safety glasses, or it would have to be a lightweight helmet mounted system that can be folded out of the way when not in use so people don't have to change helmets.
With a helmet mounted device you could incorporate the camera(s) in the helmet and perhaps even include an IR camera as well. For the stuff we work on on that project, having an IR camera, would actually be of immense help. Both for on-site work (being able to see what temperature different parts of the machine are with some accuracy), for remote observation and for documenting.