Well you need to do it this way:
when you have entered your administrator password and are inside K-9 then you need to open a new tab in your internet browser.
now for the good part. in k-9 you see the setup options. Now click on the url keywords link on the left on your screen.
this is what is needed to be done to block a single certain video with k-9
this is just a sample you tube video link to be able show you what is needed to be copied then pasted into url keywords section of k-9http://www.youtube.com/watch?v=xpvdAJYvofI
you now see there is a part of the address labeled: xpvdAJYvofI
you will take that label or the one that is in the link of the video that you want blocked from loading and copy and paste it into k-9's url keywords block section
you must have also used your browsers clear cache settings to make shure the web browsers cache that is on your hard drive
now shut down and restart the web browser in question
then go back to youtube and enter the keywords for the video that you wanted blocked with k-9 and enter its keywords in the search box in you tube and see that the video does come up.
once the link for the video does come up then simply click on it and if you did everything correctly then youll see the blocked page from k-9 showing you that the video has been blocked from being viewed
also remember in k-9's section where you enter full urls to be blocked look at the sites to be blocked that youtube.com isnt isted there and if it is then please delete it from the list.
now you can block certain you tube videos from being viewed.
just follow these directions for each you tube video you wish to block.
another thing you can do:
lets say you wanna block entire keyword searches inside you tube then do these
1) goto youtube.com
2 enter the word you wanna block: i.e. f**ck then press enter
3) paste this into the keywords to block box: results?search_query=f**k&search_type=&aq=f
4) enpty the browsers cache
5) rerrun the web browser in question
6) now go back to youtube and do a search for f**k and you should see it has been blocked.
hope this helps...