I have found that when downloading videos it sometimes seems not to do anything for a long period, then begins the download.
I have. Different video issue: when trying to watch some videos (Seminaries & Institute --> Old Testament --> "Understanding Isaiah" and "A Marvelous Work and a Wonder" for example), they do not play at all. I simply get the 'play' icon (circled triangle) with a line crossed through. However, the majority of the videos (from what I have downloaded) do work. Just a shame the "Understanding Isaiah" one was what I had really wanted to start watching.