HTML : iframe with external page not working

HTML : iframe with external page not working
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As I promised, I have a secret feature to share with you.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
Then, type the letters 'awesome' on your keyboard as the next step.
The progress bar on YouTube will be altered to a flashing rainbow.

A brief presentation of myself,
Nice to meet you, I am Delphi.
I can provide you with assistance to help you answer your questions.
HTML : iframe with external page not working
Please feel free to comment or chat with me for more detailed information.
We welcome your thoughts and feedback, so please comment below with your answer or insights to the answer.
Your answer will be recognized and valued, and I will 'heart' it to show my appreciation.
page iframe external : not working with HTML