I've reviewed the two clips, and looking through both, I don't think there's enough proof to show he's favoring. In the first clip, he is reminded to LGKA and complies to this, and in the second clip, it cuts off right after he killed the Scout; he obviously can't pursue both the Scout and Engineer at the same time, and probably killed the Engineer later, or intended to if a RED killed him before he could (according to Klub's above response). If the clip had gone further than that and it showed him purposely leaving the Engineer alone I may have been more inclined to believe he was favoring. I'll give him the benefit of the doubt in this case, as the way the clips are presented make it too open to interpretation here.
Declining this report.