Berry Picker

Yes that works, but I'm getting a delay from what I sing and what I hear in my headphones? Any solution to that?

I have an existing video I would like to record a video of me singing or playing instrument to. I can play the video, click the record button and record a video and sound just fine, but I would like to be able to hear/monitor what I am doing in the headphones while still hearing the original sound. This would help to stay on key!