Go to YouTube and find the video you want to add to your website.
Click on the "Share" button below the video and then click on the "Embed" option. Copy the provided embed code.
Open your HTML file in a text editor and locate the section of your webpage where you want to add the video. Paste the embed code into that section.
If you want to adjust the size of the video, you can modify the width and height values in the embed code. For example:
<iframe width="560" height="315" src="https://www.youtube.com/embed/VIDEO_ID" frameborder="0" allowfullscreen></iframe>
Save the changes to your HTML file and open it in a web browser to see the YouTube video embedded on your webpage.