video_VideoDecodeMemoryUsage.vp9 failed on reef since 9565.0.0 (9563.0.0 was good)

05/23 10:55:55.163 ERROR|             utils:2755| video is stuck
05/23 10:55:55.216 ERROR|video_VideoDecodeM:0376| Shaka.webm.change_video_source fail
Traceback (most recent call last):
  File "/usr/local/autotest/tests/video_VideoDecodeMemoryUsage/video_VideoDecodeMemoryUsage.py", line 374, in run_once
    name, cr.browser, videos, self)
  File "/usr/local/autotest/tests/video_VideoDecodeMemoryUsage/video_VideoDecodeMemoryUsage.py", line 228, in run
    self.loop()
  File "/usr/local/autotest/tests/video_VideoDecodeMemoryUsage/video_VideoDecodeMemoryUsage.py", line 328, in loop
    _assert_video_is_playing(self.activeTab)
  File "/usr/local/autotest/tests/video_VideoDecodeMemoryUsage/video_VideoDecodeMemoryUsage.py", line 278, in _assert_video_is_playing
    _is_video_playing, exception=error.TestError('video is stuck'))
  File "/usr/local/autotest/common_lib/utils.py", line 2756, in poll_for_condition
    raise exception
TestError: video is stuck