I copied a video I recorded on my phone to my computer and tried to add it to Movie Maker so I can edit it and upload it to YouTube. I've done this many times before. However, it is now coming up with a message that says "double-click to fix. The file might be corrupted or in a format that Movie Maker doesn't recognize." I downloaded another media player that someone suggested and tried to play it. The image appeared but stayed frozen and the audio did not play and lasted for only 10 seconds (it's about a 4 minute video). Is there some codec I need to download or something I can do to make this work in MM or does it sound like it corrupted during the transfer?

Thanks.