We are using Citrix XenApp 7.6 with the K1 GRID cards. The Hypervisor is VMware 5.5 and setup in pass-through mode. I then have had to assign each VDA a K1 vGPU.
It’s seems play back of videos is ok using applications like VLC, but video via YouTube and the BBC are not the best and can stutter which causes and issue with audio also.
Also, don’t forget to setup your Citrix Policies correctly.
K1 GPUs are ok for XenApp in Passthrough depending on the workload and the rest of the system. If everyone plays videos, then you may well run in to performance issues quite quickly and need something more powerful.