Hi Sean:

As to your question, Yes, I have had the same problem.
I haven't used it lately so I'll try to remember what Peter's suggestion was.
First, if you're not already, go out of Full Screen Chord Sheet view, using CTRL+T.
That shows all the ribbon icons at the top of the screen.

Pick the Save As icon, and select the "Save as video ..." option.
When that window appears ("Make chord sheet video"), use CTRL+T to put you back to Full Screen ...
I use the default settings (I'd try that first) then when you click the "OK - Render Video" button,
when the progress bar starts, I minimize the BIAB window. Then watch for the Completed pop up in the bottom RH corner of the screen. Click on that to open your rendered file.

It also seems to help if you either close every other app that's open on your screen, or at least minimize them all.
This may be dependent on the "horsepower" of your equipment, dunno.
Anyway, just tried it here and it works fine.
Let us know if you still can't get it to work and I'll dig up Peter's post on it.

Good luck!
LLOYD S