This nuked my playback entirely. If anyone is still active on this thread, I could use some help if you have time. Here's the error that was kicked back:
javax.servlet.jsp.el.ELException: Unable to find a value for "id" in object of class "net.sourceforge.subsonic.domain.MusicFile" using operator "."
After this error showed when I tried to open a video file that had just worked an hour ago, I undid everything that was changed in the OP. Deleted the three files, and renamed the videoPlayer.jsp file from .BACKUP to .jsp, and restored the transcoding settings. I still get the same error, even though everything is identical to the previous configuration, and even though I restarted Subsonic daemon.
Any help? I can post the Stack Trace if it will help. Thanks in advance!