SharePoint 2013 service application architecture and individual service applications

1. Compare SharePoint 2013 and SharePoint 2010 service application architectures
   Video | Presentation
2. SharePoint 2013 changes and features in Access services
   Video | Presentation
3. SharePoint 2013 changes and features in the apps management service application
   Video | Presentation
4. SharePoint 2013 changes and features in Business Connectivity Services
   Video | Presentation
5. SharePoint 2013 changes and features in Excel services
   Video | Presentation
6. SharePoint 2013 changes and features in the User Profile service application
   Video | Presentation
7. Walkthrough SharePoint 2013 features in the new machine translation service
   Video | Presentation
8. SharePoint 2013 changes and features in PerformancePoint services
   Video | Presentation
9. SharePoint 2013 changes and features in Visio services
   Video | Presentation
10. Walkthrough SharePoint 2013 features in the work management service application
    Video | Presentation
11. SharePoint 2013 changes and features in Word automation service
    Video | Presentation 

Ref:  http://technet.microsoft.com/en-us/sharepoint/fp123606.aspx