videoTracks change: selectedIndex=0
resize: selectedIndex=0 videoWidth=320 videoHeight=240
loadedmetadata: selectedIndex=0 videoWidth=320 videoHeight=240
--- selecting track 1 ---
videoTracks change: selectedIndex=1
resize: selectedIndex=1 videoWidth=640 videoHeight=480
--- selecting track 0 ---
videoTracks change: selectedIndex=0
resize: selectedIndex=0 videoWidth=320 videoHeight=240