I've published a post on a new WP site which includes two TED talk videos. I used embed codes supported through the Jetpack plugin (e.g. [ted id=2252]). My problem is that the right edge of the videos (such as where the full-screen button would show) are being cut off by my blog's sidebar. I've tried looking through my theme's options and WP settings for a way to keep the videos sized properly so they don't conflict with the taskbar - but I can't find any such options.
I'm starting to reluctantly think I may have to dig into some CSS to fix this, but I'm not sure how to find the right file(s) or exactly what I'll need to add / edit. Any help would be appreciated.