Size of featured images and embedded videos on Avada…

Hey guys, first time poster.

I’m really stumped at a problem I’m having with Avada and never really seen it before, although the other themes I’ve used up to this point have all been pretty basic.

When I embed a video (Vimeo or Youtube) and go to the page, the embed will show on the screen at the size I specified (640×360), but within a second, it will expand to full width on the page. Same thing with featured images, although images I add in the main body stay normal size. Links to the pages are below. Anyone else have this issue?

Thanks in advance!
Bryan