The UHD versions of the THX Exlipse Trailers (Long and Short) have been added to the THX trailers page. Please note that I have been unable to successfully playback the 4K versions, and I believe it is lack of processing power needed for 4K resolution. My playback has been jittery. However, I did successfully transcode the files to 1080p which played as expected. Therefore, I assumed that the jitter was not a problem with the 4K source file. If you are able to playback the file in 4K without issues please indicate in the comments. Thank you.