I've seen a few burned cars in my time. At the resolution of the video, I'm not troubled by it. It will be obvious whether it was cut/burned/oxidized/thermally effected to even a lay person at hands-on distance. With western investigators involved, I'm sure competent professionals will see it.
One thing a lot of people don't realize is that aluminum actually participates in the fire if it's hot enough. It doesn't just get all charred and ashy, it goes up in smoke and simply isn't there anymore.