Hello,
Yes, you can absolutely remove the black bar. We have a Settings menu built into the program, so I believe you would just need to turn on "Auto-Play" in the settings and the black bar would disappear. You may want to play around with some of the settings to get the right functionality for your project:
https://learn.tinycircuits.com/Kits/TinyTV-Tutorial/It is possible to solder wires onto the switch and I can find a diagram that would help with this, but I would recommend not doing this unless you are skilled with soldering in small spaces or if you trust yourself! This would involve soldering wires onto the pads of the existing switch which is close to other hardware that could be easily damaged if not being careful.
Another way to extend the power switch is to leave the hardware switch "ON" without a lithium battery and control the power using a Micro USB cable plugged into the top of the TinyScreen+ and plugged into a more easily controllable power source (like a wall outlet).
Let me know if you have any other questions, thanks!
RĂ©na