The actual video was in the sub folder media/r4c3 of the archive you linked, also the given .txt didn't contain a valid license (but I only noticed that after the upload)!
Please edit the file page ASAP to add the license.

Done:
hoo@terbium:~$ sudo -u apache mwscript importImages.php --wiki=commonswiki --comment-ext=txt --user=Peteforsyth tmp/
Import Images

Importing Writing_Wikipedia_Articles_round_4,_week_3_class.webm...done.

Found: 1
Added: 1

(In reply to Marius Hoch from comment #1)

The actual video was in the sub folder media/r4c3 of the archive you linked,
also the given .txt didn't contain a valid license (but I only noticed that
after the upload)!
Please edit the file page ASAP to add the license.

My fault, that data was actually there, the script just didn't add it because someone created the page before. I've just edited the file page to reflect that.

gigamunk.wp.bugzilla wrote:

Thanks for the feedback. I'll be more careful next time.