post youtube video to html code example

Example 1: how to add a video playing on a html page

<iframe width="420" height="315"
src="https://www.youtube.com/embed/tgbNymZ7vqY">
</iframe>

Example 2: iframe youtube playlist not working html

<iframe width="560" height="315" src="https://www.youtube.com/embed/videoseries?list=PLQGSXoAiT2W4W8D3397nl4OB_GxfOmJk9" allowfullscreen></iframe>