@Gary and Jeff:
Thanks for your response. My LG TV supports HEVC. As you indicated there is no hardware 10-bit encoding for HEVC like Quick Sync for 8-bit H264. Therefore, HEVC export takes much more calculation time than H264. I read on the internet that from an image quality point of view, there’s no real difference between H.264 and HEVC.
Nevertheless it is good to hear that it is possible and I will certainly give it a try.