Where did you find that? Not many views yet and posted very recently.
Photoshop?
Looks very weird. It’s not just the square corner, it’s the straight edges.
Got any more info?
See my reply to that post down thread.
Was following a link to youtube yesterday, & this was one of the videos that appeared on the right side of the page. Thought it looked interesting. Then your post about affecting climate made me remember this video.