Step one to embedding your very own youtube video is to find a youtube video that you want to use.
For my example, I am using the "Avengers: End Game" trailer by Marvel Entertainment.
From the youtube video you have selected, click the button that says "share" next to a little arrow icon.
Then you will click "embed", and copy the code provided.
Step three involves returning to your desired application for coding where you want to place your video. You will create a space where you want your video to be. In your code for this space, you will paste the copied code EXACTLY as it was written. You must place it into a code where it is surrounded by the "video" tag.
Congratulations! If you followed the steps provided correctly, then your video should have been successfully embedded into your html file!