to troubleshoot this further, Lets start with the insert page. we need to remove the redirect from the insert record behavior.
On the insert page, change line 54:
$WA_redirectURL = "videoshome_Detail.php";
$WA_redirectURL = "";
Then add the following code at line 1:
make sure that the Uploaded Files debug info binding is on the page anyplace after the opening <body> tag.
also add this code after the opening <body> tag:
<pre><?php var_dump($_FILES); ?></pre>
Try another upload and post back the results.