With Canon 1D X II, you can record your videos at a highest resolution of 4096 x 2160 at 60p,30p,25p,24p,23.98p fps and save in MPEG-4, H.264 and Motion JPEG formats. This means that Canon 1D X II provides 4K (Ultra-HD) video. Except some exotic 6K and 8K video recording cameras, 4K is the new standard in consumer video world.It is also a big step up from its predecessor 1D X which has a max video resolution of 1920 x 1080 only. If you are thinking of upgrading your 1D X and shoot a lot of video, this is a big factor to consider in favor of 1D X MII.
1D X MII has a built-in Mono microphone and a Mono speaker. Canon 1D X II also has a port for an external microphone and a headphone port for connecting external headphones which make Canon 1D X II a very suitable camera high quality videography.