Need specific site blocking besides category blocking in "Custom Filtering Level" for time-based filtering use

There has been a lot of questions asked about time-based site-specific blocking but there is no solution to my problem to date. I want to be able to use this under Custom Filtering Level besides the categories I chose to block.  This is because the provided default category blocking is not doing an effective job in filtering sites.  Like other have said, they want to block youtube app on Ipad and these are sites specific as "Video Sharing" category under "Custom" does not block Ipad/Android phone Youtube App as there are other video website addresses that Youtube uses for Ipad, iphone & Android device apps. I don't want to ALWAYS blacked list these sites. I set the custom filter on a particular Ipad device thus other devices are not affected by it as those are on minimum setting under Parent Controls Filtering in the Netgear Genie App. Please add site specific blocking under the Opendns Custom Filtering Level. We need more than just categories as the categories are not blocking Ipad Youtube app sites to augment the deficiency in category filtering.