Now that you have your videos and playlists set up, it's time to add a plugin to your site that will automatically add new videos to your site when you upload them to YouTube.
Because I've created a playlist, I'm going to use a category in my site for the playlist and automatically add new videos to that category as posts. If you prefer, you can use different channels for each category or you can just use one video category and link your channel to that. The latter is useful if your site will contain other content as well, such as photos or blog posts.
Tip
Note that you don't need a plugin to stream YouTube videos to your site. You can simply paste the URL for a video into the editing pane when you're creating a post or page in your site, and WordPress will automatically stream the video. You don't even need to add an embed code, just add the URL. If you don't want to automate the process of streaming all of the videos in your channel to your site...