Those are clearly Polish soldiers in both photos.
You know that !!!!....... for sure ........ where from ? You are a magician you can see what others can`t .
Related: Vintage footage - Polish pavilion at World Fair of 1939 in New York
I've just came across this full color vitage footage:
The guy (the channel owner who uploaded the footage) has many rare footages of pre-war Poland as well.
Among most intresting:
Warsaw in May of 1939 - full color original footage in 3 parts.
I wonder if that was intentional but as soon as I saw that tower I thought of the old Prudential building in Warsaw.