About the video errors and the audio sync problem so many people are having...if you're using Movie Maker, this might be something to think about.
Those of you who say the audio is fine on your end but not theirs... Well, is that the audio in the "project" file, or is it the "movie" file? There's a difference. The project file is what you get when you just click "file-->save project as". This file is not a nice, tidy package that will work for expo. It's for a work in progress, a
project. And it will have problems like the audio sync...if it even uploads. Or it will upload and say "video error".
When you are completely finished editing and are ready to upload it, go to "file-->save movie file". And then save it to a folder you have set up just for completed expo videos so it doesn't get mixed in with all the project files in your regular "my videos" file. I HATE it when I go to upload to expo and can't find the right file because I have 4 or 5 similar files that were actually "project files" that went into making the final version.
Was that clear as mud?