The first thing to check would be your internet download speed, you can do this at www.speedtest.net.
1080p HD movies require a recommended speed of 8 Mbps, 720p HD movies require a recommended speed of 6 Mbps, while SD movies require a recommended speed of 2.5 Mbps.
Winston, here is my issue. I am able to watch seasos 2 and 3 of Lost Girl without an issue downloading. I go to the 1st season of Lost Girl, and I have to wait 20 minutes for it to download. I have changed the settings, and no improvement. I will wait for the download and do other things, but it is just strange. Also no problem with movies, or other TV shows.