Sony WH-1000XM4 previewed in Youtube video

Xuan Vu Audio from Vietnam has uploaded a video comparing the WH-1000XM4 to the WH-1000XM3. The video is not in English but if anyone wishes to post a comment with any interesting information from the video, please post below. Thanks to Ross for sending this in.

I am embedding the video below, it might go down, but I have a copy saved. Check it out below.

The video at 3:04 shows the infrared sensor that is in left ear cusp. This sensor will pause/play the music automatically when the headphones are taken on/off. Screenshot from video below.