I've got a pretty decent recording from my wedding some weeks ago, and I would love to upload the wedding marches, but I'm not sure about copyright issues.
The musical pieces are Felix Mendelssohn's Wedding march and Richard Wagner's Bridal Chorus. The lady who played the organ has given her permission, but what other restrictions might there be?
If the lady playing the songs has given permission it's probably legal to post...
Perhaps mention exactly that (about the permission) in the description of the file.