I am having the same problem
Code:
ERROR: Unable to execute query

INSERT INTO `process_queue` SET
		file='Default.wmv',
		title ='test',
		description='tersts',
		keywords='test',
		channels='1',
		type='public',
		user='vshare',
		user_ip='66.XX.X.XX',
		status=2

MySQL server has gone away
I am not getting this error with a cron job, but when I try to upload a video.