Very interesting video, basically the loss of foreign contracts make it hard to afford development, which will result in further loss of foreign contracts.
Unfortunately it probably won't help Ukraine much, because it's a development over time. But after the Ukraine war, it's unlikely Russia will be able to achieve previous levels of weapon manufacturing, because Russian economy simply isn't big enough to do it alone, and exports will dwindle.
What might help Ukraine a bit though, is that weapons exports are not generating much foreign currency for Russia already.

I highly recommend to see the video, if this sort of thing interest you. Which is seeing things from a statistical economic perspective.

PS: Just out of curiosity, can anyone tell me what the accent is?