The webinar focused on video processing while the PYNQ-Z2 board has additional features that can be used when making an edge-processing prototype.
- You can use the USB host connector to connect a UART serial/RS232 adapter to then control some electronics or a microcontroller board with it logic that can be accessed/controlled via a serial connection
- You can use the GPIO on the board to play with some electronic components but also to control an optocoupler or a SSR to emulate button presses on a camera used in your prototype (turn a camera on without physically pushing buttons)
- You can use a HDMI camera but also you can use a PC/Laptop with dual-display in mirror configuration - thus providing a specific image or video to PYNQ for your code needs
I have such examples and bit more showcase in my article at: https://rk.edu.pl/en/using-gpio-usb-and-hdmi-pynq-z2-board/