У вашего броузера проблема в совместимости с HTML5
Panasonic GH4- Noise test at various ISO settings under the Scenic image setting
All settings are documented on the opening still frame of the GH4 LED screen, then at the bottom of the footage for the ISO changes.
Shot internal to SD card FHD, All-Intra, 200M (1920x1080, 23.98fps)
Output H264 matched source settings (1920x1080, 23.98fps)
*Note: To view HD resolution, be sure the YouTube settings are set to HD.