Create video demo of application

[Trashboat-99]

Acceptance Criteria :
-Create an mp4 video demonstrating the following capabilities of the PyChat application

1. Starting the Server and Client
2. Starting multiple clients at once (multithreading)
3. Sending a regular message
4. Sending a message with a warning word
5. Sending a message with an illegal word
6. Show insert of username to blacklist.txt
7. Show insert of username to username.txt
8. Show a user on the blacklist trying to enter the chat room