Issue [SOLVED]:
Turns out it had nothing to do with libraries.
All the files in the zip have End Of Line (EOL) markers at the end of each line and it was interfering with the operation of the files. (This was with versions 1.3 & 1.4. I'd expect v1.5 soon.)
What should have been:
#!/usr/bin/bash
was actually
#!/usr/bin/bash^M
To remove these with Notepad++ do the following:
Open the file in Notepad++
[Edit > EOL Conversion > Old Mac Format] to remove all the End Of Line characters. Save file.
Then: [Edit > EOL Conversion > UNIX/OSX Format] Saved the file again.
All the ^M's should be gone. Open the file with vi to confirm that they're clean.
VideoScreensaver is working perfectly now. Thanks so much for all the time you've spent with me on these couple of issues!