Hello, USA main here. The video above is just one of the uses for cyrocopter I haven't released the other videoes yet. The initial cryobeam actually a decent amount of debuff so don't be afraid to get some in order to combat buildings or heavy units. You'll rarely reach the last stage of the cryobeam but at that point anything can kill the frozen unit.
For example, a frozen MCV can be killed by 3 stormchild missiles or a single mercury strike. So one of my favorite tactics is to sneak a Cyro into the back of the enemy base and then go for important tech buildings. T3, MCV or WF. I think it takes around the same amount of time to freeze for all kinds of buildings so feel free to target the big bois.
Btw cyrocopters are the answers to epic units. Got a centurion or a Madman that needs to be taken care of? Freeze it so that even a mere G.I can kill the big bullet sponges!
Tldr 3 basic uses, Base harassment, Epic hunting, and general debuff.Go to the full post