If your singing is already an audio file assigned to lets say the Melody track (or the designated Audio track), it should have registered to the program as "Artist" file, and consequently also should have been included in any audible export that you did, videos included.
If it didn't, then something has evidentially gone wrong somewhere.

But as I say, this should already be possible and not need a specific request post (I detest that 'wish' term for this forum with a passion!).

Last edited by Icelander; 12/16/17 06:09 AM. Reason: further details

Just because you can, doesn't mean you should!
----------------------------------------------------------------------
BBox 2022 Audiophile, Mac Pro Intel, OSX 10.6.8, 800x600 (TV VGA)