I have seen that one, as it happens. I am not an expert, but it looks to me like the asserted Hellfire hits a cruise missile and knocks some pieces off as the Hellfire fails to detonate, and the cruise missile then course corrects from getting knocked around.
The best way to determine that would be to have a number of experts independently assess the footage without being primed as to its provenance. A presentation by someone who is already convinced it's aliens to some congresscritters in need of a distraction is hardly that.
You're seeing a grainy video for a reason. It would be trivial for you to have every piece of data related to an incident but if you did, that might be problematic for multiple reasons, one of them being it would expose capability. Usually, multi-million dollar missiles aren't used on unknown targets with unknown capabilities for unknown reasons. Thus, more information is required.
So, where are we left? With you demanding inaccessible information to draw a conclusion. Given that you can't have it, you're essentially just throwing your hands up and saying "well, I guess we can't know". Fine, but untrue, as we can simply demand to know.
That is what people are doing. If you're at all concerned by any of this, you should be in this camp as well.
Regarding "distraction", how is this a "good" distraction if it's not a widely credibly held position and can clearly damage your reputation? This is just a nonsense idea. There's no reason to believe these people are lying.