You might be thinking, "Oh, come on now, how can they be imagined to have constructed watertight and airtight stone channels with gates running up 3/4 the height of a pyramid to float heavy blocks?" That's outrageous. But that possibility is covered in the video.
The pyramids themselves are outrageous. Everything they did was outrageous. It's why we love them so. But not so outrageous as us. We went to the moon. We sent robots to Mars. Probes to the outer planets. The Europeans landed on an asteroid. That's outrageous.
At the site of the Wenis pyramid the host shows us a causeway, previously imagined a "walkway" but with three-foot thick walls and an inexplicably large and heavy covering, all extravagantly well oversized for a simple walkway. Still extant. That's how fabulously sturdy it is.
Remember Wenis? You see the desert hare hieroglyph inside a cartouche and immediately think "Wen" for "Wenis and sure enough there's the redundant zig-zag "N" the frond "I" and the folded cloth "S," plain as day. The rabbit makes me happy just seeing it. (Also English for the wrinkly skin on the back of the elbow. Remember the schoolboy tugging his mother's elbow skin when she was driving and surprising her with a new word?)
Give it a chance. It is an excellent theory that is supported with new understanding drawn from various sites. The naysayers at YouTube comments are stuck in the mud, unwilling to release their established conceits. Beliefs. They are intellectually inflexible. Too rigid to synthesize new information.
Even if it's not your cup of tea. Just drink it anyway.