Thanks for finding that. Circular wing aircraft have been around for a very long time. You can clearly see the engine and the propeller in the video. Personally it looks a little scary to fly judging by the handing it seems to have on the landing approach.
Circular wing - Wikipedia
Nemeth Umbrella Plane
Nemeth Parasol: Strange Aircraft that Flew
Model builders are very familiar with this type of wing design. It's no mystery and has it's origins in the 1930's. As an example, Roy Clough is a very famous name in aviation and especially in the field of model building and model flying. Roy created a number of experimental designs which are today legendary for their creativity and originality. Many of his model designs were later created in experimental aircraft in full scale.
Now for those whom are interested there's a website called "The Outer Zone" which was created to safeguard the millions of hours and thousands of model plans that have been created over the last century. It is a treasure trove of plans and information of world renown today. Almost every flying model builder knows about this site. I have myself made contributions to this site, both in plans and in restoration work on existing plans: It's a global effort by many tens of thousands of individuals.
Outerzone : Free plans : Collection of free vintage model aircraft plans to download
This is one or Roy's interesting designs. There are more UFO saucer plans but this one is rather unique though not a saucer. The plans are free and you can just click on the red download and another page will open with the additional links to the PDF's with plans and articles about the design.
Flying Saucer plan - Free download - Outerzone
Outerzone : Search results: Searching for keyword [Roy Clough] found the following free plans
Again, thanks for the video but it disproves absolutely nothing and of course this is precisely what I would expect ATS to shovel out as an explanation, like we are all just dumb as F__.
The first video doesn't have a close enough shot to tell for sure. I will grant that it could be this home built experimental plane given the lack of a better video. However this is probably just another dumb attempt by the powers that be, just like they are now to replacing key words with dumbasses and their shills whom just happen to be using the exact same name, and thus ruining life and intelligence for everyone else. So here we have another dumbass who just happens to have build a plane which can be mistaken for a UFO: Big clever joker huh?