I think people need more info, it's very unclear what your exact problem is.
Assuming this is about recording a movie with an external device and watching it from there: what is the exact setup you are using to record?
I have a Hauppauge HD-PVR and when you watch the recorded footage through a secondary device (e.g. laptop or pc), you're watching it after it's been recording/processing the incoming signal (=delay). Which is why the HD-PVR has a seperate (component) output which is a copy of the original signal (=no delay), so you can play and record at the same time without lag.