I want to put a border around the YouTube feed I am displaying via the MMM-iFrame module. I’m not a programmer but have tried setting a border via the module CSS multiple ways with no success. When I copy the embed code I see there is a border property but the module author, alberttwong, has me stripping out everything except the url and autoplay.

https://www.youtube.com/embed/tHKvusCEic4?autoplay=1

This is embed code from the YouTube share option minus the iframe start/stop because it was preventing me from pasting in YouTube code.

width="560" height="315" src="https://www.youtube.com/embed/tHKvusCEic4" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen

I’ve tried various ways of plugging that option back in, to no avail. I also see that the YouTube player has some border options also but I’m stumped. Anyone have any suggestions?
I hope I placed the code blocks correctly in this queston.