sorry, i think it is the video do not support quality 384 onward

i think i have the same problem with dailymotion (720,480,384 all with same size)

• Browser: Chrome 58.0.3029 Windows 10
• User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36
• Extension: userjs-chrome 7.36.2