I'm jealous. I lasted about half an hour on Wayland, but several apps I use still don't work. xtrlock (anti-cat measures) and freetube both wouldn't work, but worse was that games like Dying Light crash almost immediately. On KDE 6 / X11 it's a little better but the game still craters after an hour. Still figuring out why. Maybe it's because the laptop is an AMD ecosystem.
I don't know about the other apps/games, but I use freetube all the time on my KDE5/Nvidia/Wayland system and have never had an issue with it. Which distro/gpu/driver version are you on?
That being said, I recently switched to Wayland again after a hiatus and it seems support keeps improving. I'm not using proprietary NVIDIA drivers currently so that might be it.
[0] Device-Dependent X, i.e., the bits of X that talk directly to the display. Contrasted with Device-Independent X (DIX), i.e., the bits that do state tracking and protocol communication with clients.
I have it and works fine on plasma6/wayland.