Facebook deletes my video

If you upload your video on Facebook and used a copyrighted music, then it is very likely that Facebook will remove your video and there is nothing we can do about that.

Even if you bought the music on the iTunes Store, Facebook doesn’t know that you bought the music. And if you use a music from Quik, same thing you still have to go through an annoying process and tell them that you have a licence and the rights to use the music, they have to review your claim and it's really... a pain... We've given up! 

You can try to simply copy and paste the link of your video: for that choose share via email sent to yourself so you'll get the link of your video.
Sharing your video as a link will work / uploading it as a file may not.