I think this thread cursed me. I just got the exact same message.

ERROR: Unable to execute query

INSERT INTO `process_queue` SET
file='file-537100035.flv',
title ='Razorbacks Football Practice',
description='April 2006 practice session of the Arkansas Razorbacks, featuring comments from the Razorbacks' head coach, Houston Nutt',
keywords='arkansas razorbacks houston nutt ncaa college football hogs',
channels='49',
type='public',
user='Hogman',
user_ip='XX.XXX.XXX.XXX',
status=2
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'head coach, Houston Nutt', keywords='arkansas razorbacks houston nutt ncaa col' at line 4
The only difference between us is that I was able to go back and upload it by just removing the apostrophe.

It would seem that version 2.4 does not like to have an apostrophe in the comments. This isn't a problem for me personally, but I would hate to think that users run into an error like this just because they use something as common as an apostrophe.

Admin...HEEEELLPP!! :D