Heat Pump Defrost Question

https://telegra.ph/Heat-Safety-Steps-While-Waiting-on-AC-Repair-From-Comfort-Experts-in-a-North-Fort-Worth-Heat-Wave-11-14

Heat Pump Defrost Question Is it normal for a heat pump to blow steam from the outdoor unit in winter? Ours did that during the freeze last February and I panicked a bit. Sounds like it might just be the defrost cycle from what I'm reading here