Surf Soho - content blocking questions

Question on content blocking - There are a few websites that I have tried to block and wont block when tested by accessing through browser. For example, tried to block www.tubitv.com. For some reason, the site cannot be blocked. Tried different spellings, etc. Maybe there are other domain names like youtube.com uses. any suggestions?

It appears that HTTPS traffic cannot be blocked. Is that correct? any work arounds available?