Or maybe this is a coding mistake/code typo that needs to be fixed in this plugin. Post a new thread in this plugin’s WordPress.org plugin support page.
File: class-sublimevideo-actions.php – Code Line: 24
$iframe_src = SUBLIMEVIDEO_PLUGIN_URL."tinymce/sv-insert.php?' webkitAllowFullScreen='1TB_iframe=1"; Code fix after removing the single quote code characters $iframe_src = SUBLIMEVIDEO_PLUGIN_URL."tinymce/sv-insert.php?webkitAllowFullScreen=1TB_iframe=1";