Control Video, iFrame and Embed Sizes

Videos are responsive by default which means they will automatically fit to the standard 640px wide content area. This is best probably 90% of the time, but not all videos/embeds look good at that size/quality and perhaps you need more creative control anyways.

While editing a page or post, simply switch to Text/HTML mode and wrap with:

<div style="max-width:480px">
...VIDEO CODE HERE...
</div>

Change 480 to whatever width you need. And if you do not want your embeds to be responsive at all and stay strictly at the size you set, change max-width to width.