The Query String contains url encoded single quote code characters:
%27 - %27webkitAllowFullScreen=%27
See this Forum Topic link for the solution: http://forum.ait-pro.com/forums/topic/apostrophe-single-quote-code-character/#post-6939
You may need both a Plugin Firewall whitelist rule and the single quote solution above or you may just need the single quote solution above.
Do BPS Pro General Troubleshooting step 4 or just remove the Plugin Firewall whitelist rule and see what happens after doing the single quote code character solution.
4. On the Security Modes page select the Delete plugins .htaccess File Radio button and click the Activate button to deactivate/delete the Plugin Firewall .htaccess file.
BPS Pro Troubleshooting steps
http://forum.ait-pro.com/forums/topic/read-me-first-pro/#bps-pro-general-troubleshooting