Thanks Canada.
The 3rd commander ability appears also on top of the profile for the 'Obersoldaten'. It is a muni purchase that gives the units STG44s with infrared scopes. Does it shoot through cover? Range bonus? It's not nighttime..
The 5th commander ability is command panther. He explained what it does in the video but I didn't catch the details.
It probably gives them a short range increase, accuracy increase, or passive infantry detection ability.