Notice that the editing makes it seem like he thinks it was some suspicious object, but if you just take what he says it is basically "we saw something, it wasn't clear what it was." Even in the edited interview it is clear they thought it was part of the rocket, because they asked where it was.

Clearly it didn't seem very important to them then: they kept an eye on it but weren't concerned.

Turns out it wasn't the rocket, just some panels from it.

That makes a lot of sense physically, and is consistent with what he says there and later on Reddit.