Hi

Well there are two official training courses for the VCAP5-DCA:

• VMware vSphere – Fast Track
  
• VMware vSphere – Optimize and Scale [v5] – Available Summer 2012
  

As for videos i'm sure there will be but i haven't seen any official mention. Although seeing as the exam is going to be about 70% the same as the VCAP4-DCA you can use all the VCAP4 videos out there:

• VMware vSphere: Troubleshooting [V4]
  
• VMware vSphere: Manage for Performance [V4]
  
• VMware vSphere: Manage and Design for Security
  
• VMware vSphere: Automation with vSphere PowerCLI
  

I've done a breakdown of the VCAP5-DCA blueprint if your interested:

http://thesaffageek.co.uk/2012/04/16/vcap5-dca-beta/

You can also use the vSphere 5 trainsignal videos to fill the gaps from vSphere 4 to 5

http://www.trainsignal.com/VMware-vSphere-5-Training.aspx

Gregg