On Windows 10, this test actually plays a clip, reporting time from 40 ms to 3040 ms and duration=INDEFINITE but on macOS 10.12 it fails not playing anything, reporting
 [mts.java.AbstractTest] initialize test
url => certain_url.m3u8
[mts.java.AbstractTest] run test
duration: UNKNOWN
width: 320
height: 180
onPlaying
time: 22399.522222222226 ms
duration: UNKNOWN
[mts.java.AbstractTest] cleanup test
[mts.java.AbstractTest] test failed (invalid duration)

Looks like it has a problem accessing the video.