It's worth not trying to understand what happened in the first few hours, you'll rarely be correct. The video could have been an old one that someone uploaded

It's worth not trying to understand what happened in the first few hours, you'll rarely be correct. The video could have been an old one that someone uploaded as misinformation. The video can show you that the plane looks like it was shot down, but it can't show you that it was done accidentally by Iranian military. The "reports" of it being accidentally shot down could just have been made up by someone, unsourced. Actually, it looks like they're coming from Al Hadath, which appears to be a Saudi-controlled news TV channel.