Block only home page

[truth1ness]

Hi, is there a way to block just a root url like a home page but not subdirectories? For example, say I want to block the youtube.com home page to prevent mindless looking around but I want to allow subdirectories so I can still manually go to specific videos intentionally.

If not perhaps you could add the ability to put quotes around a url to block only exact matches with that URL but not subdirectories in that top level url.