There is. In fact I think there's a few ways. One would of course be with womble and copying another black screen portion of the video and just copy and pasting that over the first few frames while making sure that the audio doesn't copy over into those frames too. However, there is another way that's much better. I just can't remember the name of the program. Wait for someone else to pop in here and I'm sure you'll get the answer you're looking for.