Reallusion should do a video on how to work on the record button. 

Press the Spacebar, or is that not the record button you mean?

So when you open a panel that can record, there is both a preview and a record button. The preview button is redundant. Just hitting spacebar puts you in preview. If you do suckered into hitting hit, you then have to hit the spacebar anyway. When your ready to record, the story is a little different. hit the record button and then the spacebar to actually initiate the recording. When you hit the spacebar to stop, it goes completely out of record mode. So hitting spacebar again puts you in preview.

Beats me why they have a Preview button!