How to solve the source code problem:

"https://www.youtube.com/watch?v=eI4an8aSsgw"

"https://www.youtube.com/embed/eI4an8aSsgw"

How to Center: <center><iframe width="560" height="315" src="https://www.youtube.com/embed/link" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe></center>

Source:

https://forum.freecodecamp.org/t/youtube-refused-to-connect/245262