Block Facebook & Youtube on MikroTik Router

Scenario

You work in a small company having a Mikrotik Router. Your internet connection has became too slow, and after investigating you have seen that a lot of employees are using Facebook and Youtube on the work shift time. For this reason, as being an IT administrator, you have decided to block Youtube and Facebook for all users and keep it open to you.

Your tasks are:

Create Layer 7 protocol pointing on Facebook & Youtube
Apply the firewall filter in a way that Facebook & Youtube are blocked for everyone (except you) and all other traffics are open
Check if your configuration is done correctly by doing tests.