Adding a border to an IFrame is no biggie - you do it like this e.g.:
border: 4px solid #000;
-moz-border-radius: 15px;
border-radius: 15px;
>
You can also do it like this:
I have also included all the youtube options in the above example:
1: autoplay=1 (0/1 | automatic play movie)
2: loop=1 ( 0/1 looping on/off )
3: rel=0 ( hide related movies after movie ending, this does not always work)
4: border=0 (removes youtube border)
5: modestbranding=1 (removes youtube logo)