Sift pillar KronosPoseidon's first and second ST posts educating the community about how to go about up-sizing your video embed sizes got me thinking and I finally acted on the thoughts that ensued.

Effective already, any time you submit a video, the width and height dimensions will automatically be resized so the video is the maximum permissible size without you having to do anything at all. This will work with possibly 100% of embed codes, but let's just call it 99% in case someone decides to get extremely creative with the embed code format.

Thanks for the idea, kp!

[edit]
Oh, yeah. Comedy Central embeds won't get upsized because they don't work. If you notice another host for which upsizing fails, let us know here and we'll single them out as well.