HTML : Javascript src property doesn't work

HTML : Javascript src property doesn't work
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I'm going to share a hidden feature with you.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
After that, type the word 'awesome' on your keyboard.
The progress bar on YouTube will be altered to a flashing rainbow.

A little intro about me,
Hello there, my name is Delphi.
Allow me to provide support in answering your questions.
HTML : Javascript src property doesn't work
Let me know if you have more specific questions or concerns by leaving a comment or starting a chat.
Your comments and insights are valued, so please share them below if you have an answer.
A 'heart' from me will indicate my appreciation for your answer.
HTML doesn't Javascript : property work src