Video problems

Hi. I've had a few problems when making videos on Camera on my Android phone. When I record a video, I can see that it's recording, I can see the file in my Gallery, but when I try and play it it says 'Unable to load video'.

When I connect my phone to my laptop, I can see the file in memory, but it doesn't let me view the video I've made (even though it's there!).

I don't make a lot of videos - only of really good songs at gigs, which is annoying because I can't watch them!

Can someone help? Maybe there is a converter somewhere I can change the corrupted files and FINALLY watch my songs!

Thanks