so you want to filter Active-X objects. Flash in general is an Active-X which might be filtered. Can you elaborate on what you exactly have entered and what you are looking to actually block? Can you describe what is 'broken' in youtube and other flash pages?
we want to filter activex but no flash. Example: http://www.youtube.com/watch?v=D56wGhy6qkk
Flash is comming up and wants to load the video (so the flash is not filtered out). After a few seconds the attempt is stopped with the message "an error occured. Please try again later". I am using the default setting.
Workarround: Disable the HTML Filtering four youtube. But using this workarroud means to insert all known video/audio sites to the list of allowed hosts (which is a lot of work).
instead of manually adding all Video/Audio sites by URL you could use the URL filter categories, such as "Streaming Media" or other multimedia related categories. Doing so you would not need to manually add URLs.