After some research, the video options are:
A) Analog RGB 15kHz PAL SCART signal
B) Analog RGB 31kHz VGA signal
Anything but VGA will require a nonstandard cable.
TFT will work, IF the screen manages 50Hz. VGA maybe will work different. NTSC may be possible be reprogramming the DCM. Or changing the Crystal.
Possible software wise, but not implemented:
It should be possible to construct a component video by reusing the R-G-B signals as Y-Pb-Pr. This can be done with addition, division and subtraction.
Same for S-video, and Composite. But it's not likely to have any good quality (too high quantisation noise).
DVI/HDMI is not possible without special transceiver chip.
A bare laptop screen may work with some direct soldering to the digital video signal and level conversion. And provided the screen will handle the Vertical and Horizontal refresh rates.
Clarification on what a "standard" TFT screen can handle would be nice to know!
