WordPress is very user friendly Website development and management tool.

There are set of plugins which I find useful.

• WP User Avatar : To change the Blog Author’s image
  
• Contact Form DB: To create tabular format of contact data submitted through Contact Forms which can be exported later.
• WordPress Video Gallery: To import YouTube playlist quickly. There is a common mistake which should be avoided. Feed would remain playlist and playlist id to be added in user. Example:
  Error type: "Forbidden". Error message: "Method doesn't allow unregistered callers (callers without established identity). Please use API Key or other form of API consumer identity to call this API." Domain: "global". Reason: "forbidden".
  
  Did you added your own Google API key? Look at the help.
  
  Check in YouTube if the id PL08903FB7ACA1C2FB belongs to a playlist. Check the FAQ of the plugin or send error messages to support.