Though there seems to be little information available, I've seen several posts of people successfully decoding H265 video on the Pi 3 either with, or without overclocking.
I'm running a Raspberry Pi 3, which is used primarily as a Plex media server. While other files play just fine, (even at 30fps@1080p!), the Pi seems to choke on H265 encoded files. "Plex new transcoder" jumps to over ~350% CPU and the video pauses to buffer once every minute or two.
Overclocking to 1400Mhz seems to have helped, but did not suffice for smooth playback.
Is it unreasonable to expect H265 decoding/transcoding from the Pi 3?
Will an MPEG-2 License help? Do I even need one for the Pi 3? And if so, will the Plex media server take advantage of it?