I suppose if you got a Black Magic Intensity Shuttle and fed the HDMI into it, then into your Mac or Windows machine you could use it. Sort of crazy expensive to do, but if you already had one it would likely work.
todd's absolutely correct that you could run standard DEF out of that 300 via the easy Product. As I mentioned on the other post, I use the easy To capture VHS tape's. It works great. I never thought of using it in this way but it very likely would work just fine . The easy Product and Software are solid, I've had no complaints using it.