I did several experiments with a friend who had a powerful highly advanced 10" telescope and I had my P900. His telescope saw a fraction of what my camera picked up and maybe that was the problem, but the fact that both of us got pictures and video is a testament to the fact the stars are not millions of miles away. Neither instrument can do that.
If your meaning by the bolded text above is that you saw
more detail in the Nikon P900 w/telephoto lens used alone than the 10" telescope used alone, than something is gravely wrong here with the acquisition or the interpretation of the images. The 10" telescope will always give more detail and brightness due to the larger aperture. If the telephoto lens + camera alone seemed to give a bigger image or more detail, what you are seeing in the camera is artificial and caused by the camera itself rather than a feature of the star or other object in question. It is most likely due to an inability of the telephoto lens (which is designed for land objects, not the sky) to focus on the star an resolve its light to a point. Or, poor optical quality of the camera is scattering the light and distorting it. If your friend's 10" telescope produced images exactly like the ones in the youtube video, it is out of focus and/or has some serious optical problems.
Unless you want to call me a liar, the stars look exactly like the "boiling" shapes captured in that video and every star is totally different from every other star.
To be clear I'm not calling you a liar here or in the previous post, but I do think you are unfortunately mis-using your equipment (or using the wrong equipment for the job) and are misinterpreting the results you are getting. De-focused stars
will always look like those boiling shapes, and each defocused star may indeed look different from the other. The problem is, de-focused boiling star shapes don't tell you much about the object in question other than the quality of the optics you are using. It would be like defocusing a pair of binoculars looking at a cardinal bird until all you see is a red blob; it doesn't tell you much about the characteristics of the object, other than the fact it is red. Look up "star testing" of telescopes and the "airy disc".
In-focus, when testing the optics, the star should look like a point. as you de-focus on either side, it will expand to a symmetrical disc with rings within it. Asymmetry or irregularity (as in the video) means problems with optical quality, or thermal/atmospheric disturbances
(
https://www.skyatnightmagazine.com/advice/how-to-star-test-a-telescope/ )
Until you've done this with a p900 yourself, or realize there are a myriad of videos with similar results, taken by hundreds (or even thousands) of people who don't even know each other, and who are only trying to understand what is going on, you wouldn't be so willing to make this false assumption.
I've used quite a few digital cameras, binoculars, and telescopes over the years, and could easily replicate the boiling blobs you are seeing. The problem is that once again in order to replicate this, you need to de-focus the image, which defeats the whole purpose of looking at the object in the first place, unless you are testing optical quality. Take a pair of binoculars, look at a star, focus it to a point, and then de-focus it a little and that will approximate the boiling blobs you are seeing in your camera or in that youtube video. And yes, a lot of folks out there sadly don't know how to use their equipment; they mean well, but are mistaken. There are also a lot of folks who
do know how to use their equipment who report the stars as pinpoints. And these aren't NASA "elites", but folks who chat on public forums just like this one.