I uploaded my 5.31-minute video (618 MB). Then I tried to caption it in English. The status is "processing" for more than 6 hours. I called Canvas and they recommended waiting for 24 hours and if it's still the same, I shall call them. 

Later I uploaded another video (the same video) and tried to caption it. Caption is still "PROCESSING". There was not "QUEUED" word to be shown. 

Is my video too big? Is there anything I can do?