After the object tumbles, an effect transition has been added. You can tell because it overlays the "Pause (Ctrl+P)" control and how blooms outside the cropped video frame. This strongly suggests that it's not actually a continuous time shot.

Perhaps:

- This video is of an ordinary cruise missile or drone.

- Its surface is very hot, making it appear as a blob.

- The so-called hellfire doesn't detonate for whatever reason

- The object tumbles and crashes, but the video is deceptively spliced.

I don't trust this Representative to not lie knowingly or evaluate such claims skeptically. Statements like "I'm not going to explain it to you, you'll see exactly what it does" and "This is when it's zoomed out, you can still see it traveling" seem to be careful wording meant to lead people to a conclusion without actually claiming it.

(Congress stares at blurry grey pictures with no obvious point of view and no discernible objects)

- What is it?

- It's unidentified.

- Supplemental military appropriations approved! (Gavel bangs)