im afraid its broken. i used to have a similar pressed key hud from the ql forums for making a tutorial https://youtu.be/D7CIcjZXBso?t=9m30s

however years later when i wanted to try it out in wolfcam, simply didnt work. im not sure, but someone on the official #quakelive channel might help you editing it. give me a feedback if you succeed, a show pressed key option on the igmdb render would look sick.

I have tried a few more but didn't worked.
I will use defrag keypresses for reference and then add then in editing :)

Thanks mdv!