HTML : HTML5 input required attribute but not inside form

HTML : HTML5 input required attribute but not inside form
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I have a hidden feature that I promised to tell you about.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Then, type the letters 'awesome' on the keyboard.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

A brief introduction of myself,
Hey, I'm known as Delphi.
I am available to help you find solutions to your inquiries.
HTML : HTML5 input required attribute but not inside form
I encourage you to reach out through comments or chat if you have more specific questions.
Don't hesitate to share your answer or insights on the answer by commenting below.
Providing an answer will be acknowledged and appreciated with a 'heart' from me.
but not attribute HTML required form inside input HTML5 :