If you get a "404 not allowed" error while running the plugin (or 405 or 500), this is likely a script execution time limit set by your host. You may want to ask them to lift that limit.
Another option, is to reduce requirement like "show videos with only 500,000 views" as the plugin needs to filter out many videos and this takes a lot of time.
Article ID: 184
Category: 1-Click Video Site Builder