Input display for PS1 and PS2 console is extremely difficult. It requires writing custom code, timings, packet sniffing, etc. I wish it was as easy as it is for older consoles, but it's sadly not the case.
Actually, my friend @zzattack makes and sells these. http://munia.io
I feel like necro-ing this thread wasn't a waste of anyone's time :p For an example, I would recommend checking out my latest Ape Escape 2 - Any% PB here on SRC
@Cravone Keep in mind the Input Display rule applies only for Emulator runs, if you play in console the Input Display of your controller is not needed, so feel free to submit runs with the PSX console.
Due to the new Twitch policy regarding highlights and following what other speedrunning communities are doing, from today Twitch highlights won't be accepted for new submissions on the leaderboard. We highly encourage everyone to export all of your runs (or simply your PB) to YouTube or any similar