@AndyNicolaides Unfortunately, the iframe Player API can only embed a single video, a playlist, or a user's uploaded videos according to the documentation.
You could show your user's uploaded videos by doing this:
<iframe src="https://www.youtube.com/embed?listType=user_uploads&list=andynico84" width="480" height="400"></iframe>
Or you could embed a specific playlist like so:
<iframe src="https://www.youtube.com/embed?listType=playlist&list=PLRybRoahmBd4NEmRBtiuTPTo7TJUehFH2" width="480" height="400"></iframe>