UjW0L

This plugin lets you to display Youtube widget on sidebar with the themes that supports sidebar and Footer
It displays video and playlist of your choice with video id and playlist id. 
It also lets you display all videos from you youtube channel with option to navigate to next nd previous button. 
No google API key needed. Uses Youtube rss feed.
You have choice between single video , playlist and channel.
Note:

Simple Youtube Widget

Plugin that provides users option to display Youtube Widget on the Sidebar or Footer

Ross t

A plugin to add the embedding of Kulu Valley ( http://www.kuluvalley.com ) video content to WordPress content.
The plugin takes the URL of the video and embeds the video.

Kulu Valley Video Embed

Allows for the embedding of video content from the Kulu Valley video platform

Simple Youtube Widget vs Kulu Valley Video Embed