remove empty 00 from time

	# video_time_to_human("00:05:20")
	# => "05:20"
	# video_time_to_human("10:05:20")
	# => "10:05:20"
	def video_time_to_human(time)
	time = time.split(":")
	time.delete_at(0) if time.first == "00"
	time.join(":")
	end

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