I'd call to question those "engineers". I suspect a movie maker can hire just about anyone to say anything on camera. I am certain there is absolutely nothing the ancients have done that we couldn't do. The converse is not true.
If there were such super-dooper tools back then, why haven't we found any trace of them? Don't you think they'd be proud enough of them to lay them with their kings like they do with the swords?
You're a true skeptic. I don't blame you, thousands of others are skeptical. That still doesn't explain how these artifacts were created. You''re welcome to try replicating them, if successful you will be famous around the world. There are curators around the world hiding discovered items and not allowing the public to see them, because they run counter to existing prevailing theories. I'm skeptical of so-called experts because they won't openly display these strange items that run counter to what they believe. If super-dooper tools (your description) exist, they may be hidden or may have been destroyed by curators because they don't fit the narrative. Don't be a flat-earther and accept just one narrative because we don't always know what we don't know.