JomSocial and JFBConnect do work together. We'll gladly help you with any issues you have with the social login functionality or profile import. However, the registration functionality of the page in your video is completely controlled by JomSocial. If you think that JFBConnect is somehow causing the issue you're showing, then we'll gladly investigate further if you can help us understand why think JFBConnect is the cause.
In short, no, using JomSocial doesn't preclude any JFBConnect support. However, we can only help with JFBConnect problems. I wouldn't expect if you have social login issues with JFBConnect that JomSocial's support would be able to help you there just as we can't help you with a JomSocial feature that we didn't develop.
Thanks,
Alex