Why would a general disclose their weaknesses to a public forum unless it was meant to trick the enemy?
It’s not phrased as a weakness as much as it is phrased as a “give us support or we’ll lose”.
The narrators of the video say that it notifies NATO what they must do if they want the Ukraine to win. At the same time it places in the public eye the needless nature of continued fighting if the extensive aid needed is not forthcoming.
Many have lamented the loss of the Ukrainian men who are being conscripted and killed - they are improperly trained and equipped and their deaths are needless. It think the military leaders are pointing out there’s no gain just with status quo: Give us Arms or Quit the Field; fighting without massive additional support is pointless.