The Automatic YouTube Video Posts Plugin automatically imports YouTube videos from any YouTube account, creates posts for them and publishes them or creates a post draft according to your settings. You are also able to automatically update your Twitter status posting the new WordPress video post using text you specify.
When you need to display sidebar widget with latest video from some YouTube channel or playlist, you can use customisable YouTube Channel plugin.
This plugin creates a new WordPress post type called "External Videos" and
aggregates videos from a external social networking site's user channel to the
WordPress instance. For example, it finds all the videos of the user "Fred" on
YouTube and adds them each as a new post type. The videos can be presented in a
gallery using the shortcode [external-videos]. There is also a widget to add a
list of the most recent videos in a sidebar.
For Youtube, Vimeo, Dotsub.
Can grab YouTube/Vimeo videos matching a search term.
Smart Youtube PRO is a WordPress Video plugin that allows you to easily insert videos/playlists into your post, comments and in your RSS feed. The plugin is designed to be small and fast and not use any external resources.
Supports playback of Youtube, Vimeo, Metacafe, Liveleak and Facebook high quality videos, works on iPhone&iPad, produces xHTML valid code (unlike YouTube embed code), allows you to view videos in fullscreen, has robust widget support and much more.