I downloaded some music videos and put them in my 5800-XpressMusic and they're okay when I checked them. However, I have not been able to check on them again for almost a month now and when I was going to watch some of the music videos yesterday, I can't find any except for the ones that were originally in the phone before I put on the music videos. What could have had happened?

See More: Videos were erased from Nokia 5800