The Slingbox isn't a magical device. It can only rebroadcast what it "sees" and "hears". Think of it as a virtual TV. So, the only way to not interrupt the local view is by plugging into a video source that isn't being viewed locally. The Slingbox Classic does have an analog tuner which could be setup auxilliary from the local viewing. However, the Slingbox Classic only has a analog tuner, so compatibility is quite limited since the digital transition conversion.