I'm trying to use Practicum to learn more about Logos, but I'm finding it hard to follow because the video resolution is extremely low. I'm unable to read any of the text shown on the screen. I've included a screen shot below, taken off of my Macbook Pro.

I remember reading on Practicum's webpage that these videos are downloadable, but so far I've been unable to find out how to do that. It seems all it wants to do, whether on my Macbook Pro or iPad, is stream the videos.
Does anyone know how to access the high-def versions? My internet connection is 12 Mbps, so I don't think that's the problem.
Thanks!