Yes, you can watch TV on CINELERRA-GG instead of CINELERRA-GG on TV.

Figure 16.2: Multi-screen Playback example useful for watching CINELERRA-GG run on the big screen
Image multi-screen01

Figure 16.2 shows partial window of *Playback A selected and the second tab for Playback B. Note that on the bottom right of the window, Default B Display: is set to : 0.1, representing the setting for Screen 1. On the unseen Playback A window, the Default A Display: will be set to : 0.0 meaning for Screen 0. Otherwise, the default would be nothing there or just <empty>.

The CINELERRA-GG Community, 2021
https://www.cinelerra-gg.org