There is an easy way for you to embed YouTube videos in your WordPress sites. Many people have sent in questions asking for help with iframes and embed codes but for YouTube and some other sources iframes and embed codes are not necessary. All you need to do is simple copy the URL to the video you want and paste it into WordPress post.
The great thing about this is that it will embed the video using the flash object method. The reason this is good is because YouTube recently decided to encrypt all of their sites traffic using SSL. This makes the embedding less desirable as it can cause issues on pages that do not use SSL encryption.