Is it possible to change the default embed dimensions of an youtube (or another video) in Wordpress for your current theme? I've searched for a plugin and some code, but I can't seem to find any.
What I mean is the default embed size used when you just paste an youtube url in an post or page.
To change the default embed size go to Settings > Media and just set a fixed width/height.
You also have the shortcode
[youtube=http://www.youtube.com/watch?v=0Bmhjf0rKe8&w=640&h=385]
where you can manually insert width and height as params. This shortcode will overwrite the default WP settings.