PASS: isTypeSupported
PASS: created MediaSource
PASS: assigned object URL to video.src
PASS: sourceopen fired
PASS: addSourceBuffer succeeded
PASS: loaded media data (2009229 bytes)
PASS: appendBuffer() for slice 1/3
buffered after slice 1/3: [0.004-3.044]
PASS: slice 1 appended
PASS: appendBuffer() for slice 2/3
buffered after slice 2/3: [0.004-7.564]
PASS: slice 2 appended
PASS: appendBuffer() for slice 3/3
buffered after slice 3/3: [0.004-12.044]
PASS: slice 3 appended
PASS: endOfStream succeeded
buffered after endOfStream: [0.004-12.044]
PASS: play() promise resolved
PASS: playing