Here are some of the error messages I get when I try and upload videos. I have included the file size and format above each for context. I am able to upload some files but not these;

54,234 KB .avi
Progress Bar Error: Cannot find sid based directory.

3,738 KB avi
ERROR: Unable to execute query
SELECT * FROM `config` WHERE `config_name`='enable_flvtool'
MySQL server has gone away

11,478 KB avi
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.