These scenes appear to take place in the spring. US forces would have reached Passau and Linz in May of 1945.
Per Wiki, Passau is at latitude 48;34 N. Spokane, Washington is a little south at latitude 47,39N.
Note the blooming tree behind the staff car at 2:23. I don't know what kind of tree that is but The Washington State Apple Blossom Festival is a festival held annually in Wenatchee, Washington from the last weekend in April to the first weekend in May.
So, this video could be springtime in Passau.