>>1165838>>1165842>>1165844Also I just realized the context of your "by who?" in OP.
I'm sorry; I'm a bit sleep deprived following this.
The 6 aircraft were confirmed by the Ukrainian Defense Ministry. That just that the Ukrainian Defense Ministry confirmed them on their end.
You can only really truly trust videos and photos these days, or if both sides confirm it. Again, we only have 3 visually confirmed air losses for Russia thus far, but given the scale of the fighting and air operations I don't doubt it's higher than that.