As far as I know there is no option to upload- only to record...but for audio there may be a workaround-
Someone suggested recording what you want and then doing the following:
1).Get the file you want to put on Ancestry ready to play.
2).Get Soundrecorder in windows ready in a different tab
3).Run that wire from your audio out on your computer to your mike input.
4). Start playing the file and AT THE SAME TIME hot start on soundrecorder.
This should take the file straight from your computer- thru output to your mike which will input to soundrecorder and record it on Ancestry.