http://wccftech.com/youtube-hdr-galaxy-s8-xz-premium/

HDR video is slowly becoming a sought after functionality for flagships. Currently, not all platforms support HDR playback, and there are just handful content sources including Netflix and YouTube with support for HDR video playback. Netflix has recently added a few smartphones to its list of HDR support. Following the streak, YouTube has added both the Galaxy S8 and S8+ smartphones to its list of supported devices along with the Sony Xperia XZ Premium and Galaxy Note 8.

If you check the list of Android smartphones that currently have HDR support from online resources, then you will see that there are just a select few devices like the LG V30, Galaxy Note 8, Xperia XZ Premium and the Xperia XZ1. Also, one of the biggest shortcomings is that not all the video content is available in HDR. There are only a few shows and movies on Netflix that are also available in the HDR format.