Video Recording Help

I bought Cross because I was excited about the ability to record the video mix.... but so far I can't get it working. I press record and it tells me it is skipping frames and to lower the video quality. I put it on the lowest video settings and still it does the same things. I am looking for information that will help me troubleshoot the problem. How do I get this feature up and running?
Where is the information, support manuals, that will help me solve this
Thanks
Where is the information, support manuals, that will help me solve this
Thanks