Thank you, John. Appreciate your input.

I downloaded the Media Editor, opened my file in the File Editor utility.  
Before resaving it (which it says will index the file), decided to play,
maybe add markers. It only played abt. 6 min. and stopped.  Can't get it to
skip forward.  If it's not indexed, probably also doesn't fast forward, etc.
capability either.

Windows Explorer reads the file is 1:29:08 in "duration".  I tried playing
it in WMP; stopped at the same place.  The disk does not appear to be half
burned as one would expect for a file of that "duration".  Tried to resave
what I have.  Message was "failed to save"; doesn't indicate why.

The Sony camcorder is abt. 2001, the software that came with it should
create a satisfactory .wmv file I would think.  The gal that created it
doesn't remember being asked to select a "Index, yes/no" choice.  I would
think indexing would be a default - now that I've read about it, understand
it a bit better.  Albeit I feel more than a little over my tech head here.

As this point, it would seem advisable to create a new file off the orig.
mini-dvd tape which will be in a Video_TS folder, which presents another
converting challenge if I want to use WMM as an editor.  I edited the
Christmas concert last Dec.  I use Roxio, but quite by accident I suddenly
had a .wmv file.  Not quite certain how I did that.  Perhaps better to use
Windows Media Encoder?  From what I've read about Video_TS files, they're a
bit tricky to get a format video editor's will accept.

If you have other thoughts, would appreciate hearing from you.  As a retired
folk, am trying to learn the Windows film editing for our church music dept.
admin, as that's the software the church provides.  The camcorder is her
family's personal one.  Does a decent job, especially off the church's sound
system which is a challenge in itself.