[old_tv_nut]

The lines at the top are the Copyguard protection from your video source. They prevent videotaping the signal. Old TVs without power vertical retrace blanking will show them. This is the bane of vintage TV restorers. If you are using a separate player and modulator, you can find a device to purchase that you insert in the video feed to remove them (or a schematic to build your own). A professional video proc amp (generally more expensive) that reinserts clean sync and blanking also does the job.