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Microsoft | TechNet
Video | SharePoint 2013 for  IT Pros

Additional Resources:

• Lynda.com – Great basic SharePoint 2013 videos.
• SharePoint Videos | Asif Rehmani
• Infinite Skills – Excellent free SharePoint 2013 videos.  Gives a flavor to some basic Central Administration tasks. [You Tube Channel]
• ShareMuch  | Yaroslav Pentsarskyy [You Tube Channel]
• EPC Group.Net | [You Tube Channel]
  {Development for SharePoint 2013 & Apps }