Key Casting for Mac that Works in Full Screen

So I installed and used Keycastr for a little bit.

But it won't work in full screen.

There aren't seem to be many of these key casting softwares available.

Can someone please tell me one that works?

Cuz I stream myself coding, I figure it'd be helpful for them to see how I use Vim and Vscode shortcuts.

Many Thanks
Vinny the Poon