IPhone 6s videos aren't loading - just a white blank screen?

I went to a concert today only to come home to most of my videos as blank white screens! The thumbnails are white and the actual video is white although the audio is working. I have other videos that are working fine but most of them look like this!
I'm so so disappointed… Is there any way I can fix it?

Nope. Extract the audio and use your own memory to provide video