In my search for a once-and-for-all WP plugin to handle YouTube, I came across EmbedPlus. I'm still feeling my way through all the features and control mechanisms. I decided to upgrade to the PRO version to give me that opportunity.
I ran into a problem with the YouTube videos not sizing properly on my post pages. I contacted EmbedPlus and they responded very quickly. We emailed back and forth and ended up determining that the problem was in how the theme was coded. EmbedPlus wrote a quick workaround to implement within the theme and now are completing coding within the EmbedPlus product to eliminate the problem in the future.
These guys know what they are doing and stick with the problem until it is resolved. I highly recommend EmbedPlus.