If your file download is incomplete, the PE won't tell you about it, just reboot aver and over. The full ermine update is 140MB or so. When you get it, see if you can open it just to make sure it's not corrupted. When you drop it into the thumb drive, put it in the root, make sure it's called update.zip and don't unzip it. One other things that seems to work is to load it from microSD, or (when I did it) make sure there is no microSD in the slot when you update.
For YouTube on Android I've had great success with an app called TubeMate. It's available in the Amazon market and downloads/converts very well. I haven't used the other app people above me have mentioned.
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