now there is a need to use video.js to play video resources dynamically selected by users. Users can manipulate the video at will: 
 for example: 
 
video.jsloadedmetadataaviflvjqloadedmetadatavideo.jsvideo.js
:
html:
js:
:
: 
 
 set flash to allow and refresh the interface, but I still report this mistake, what"s going on? Use video.js, for advice for the first time. Thank you. 
