take this bit of code:
<iframe width="0" height="0" src="URLHERE//?&;amp;;autoplay=1&;loop=1&;controls=1" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" loading="lazy"></iframe>
go to the youtube video you want, press share, then embed, then you'll be at this screen:

copy only the blue highlighted text (between the " and the ?) and paste it into the above code where it says URLHERE. then, copy the code and paste it into your about me section, making sure it's not between <style> and </style>.
lmk if this works, i'll try to help out more if not!