This is the TYT MD-398 Power Test video.
This is a DMR radio from TYT, with a claimed output power of 10W on high. This is the UHF version of the radio, although I am not aware of a VHF version.
The TYT MD-398 does not support two time slots, so using it to access DMR repeaters should be avoided, as it will cause issues on the repeater. This is because it occupies both time slots.
It is identical to the Radioddity GD-55. The only difference is the branding, nothing else.
Here is the video, enjoy: