Continuity mistake: The rear of the steer carcass was on fire and smoldering, but not seconds later in the aerial view. Also in the aerial view, the position of the steer relative to Alexander was different. (00:06:00)
Other mistake: The first setting was 2031 in post-apocalyptic Germany after a worldwide pandemic (an ongoing threat). Alexander met Joshua on August 27th. August temperatures in Germany are in the 70s-80s with a high probability of rain (which was absent). Both wore scarves and coats. The scarves were not being used to cover their noses/mouths to protect themselves from each other or whatever may have been in the air/atmosphere, so there wasn't a rational reason for them to be wearing either scarfs or coats. (00:10:30 - 00:11:18)