The first one is about Moses being called by God at the burning bush in Exodus 3 (performed by Ken Medema). The guy at church didn't do this one, but it's excellent (he did do the one about Ananias below).
Another good one is about the disciple Ananias, whom God called to minister to Saul/Paul in Acts 9:
https://www.youtube.com/watch?v=4ZbP9VsZW5I (performed by Fred Frank, who also has a good performance of the Moses song on YouTube). For some reason, I can't get the video to load up on here like the other one, so just use the link to view it on YouTube.
Praise God for the timeless truths found in His Word!