Thanks Nathan for submitting ticket in the trac. http://www.boonex.com/trac/dolphin/ticket/3365
For now, I'd like Boonex to address a temporary fix for deleting video comment files from server until it is updated in 7.1.5 -- I can't have orphaned files that takes up space until then. I would not be able to know which has been orphaned and what not.
I suspect it has to do with a few code edits to make this happen. (BTW, chmodding 777 doesn't help)