iquark

YouTube Playlist show the list of videos of a given YouTube’s playlist ID.
You can choose to use it by widget or by a shortcode. There is an example if you whant to do it by the secon option:
[youtube_playlist id=”PL335DD2E2EE782021″ maxResults=”2″ thumb_size=”small” class=”youtube_playlist”]
The parameters are all optional: 
 * id: is the playlist’s ID, you can put it in either starting by PL or not, it has a default value, but is interesting you put yours :P. 
 * maxResults: the maximum number of videos to show, by default “2”. 
 * thumb_size: you can show the thumbnail “small” or “big”, by default “small”. 
 * class: you can change the class of the list by one who is better for you (in case you need it), by default “youtube_playlist”.

Youtube Playlist

YouTube Playlist show the list of a given YouTube's playlist ID.

geilt

Enables a widget that will pull a youtube feed via JSON by Youtube Username/UserID or PlaylistID and display text and/or video preview images. Supports images thumbnails, image thumbnail galleries (as slider) and more. Does not play videos on your site, only links out.
<a href="http://www.esotech.org/plugins/simpul/simpul-youtube/" rel="nofollow ugc">More Details</a>

Simpul Youtube by Esotech

Enables a widget that will pull a youtube feed via JSON by Youtube Username/UserID or PlaylistID and display text and/or video preview images.

Youtube Playlist vs Simpul Youtube by Esotech