Is it logical or not ? I am just asking is it reliable.

I recognize this video, and no.

You can't look at a star's color, look at the chart, and determine its luminosity value. That's simply not how it is done. All stars basically appear blindingly white (with exceptions, of course) if seen with the naked eye from space because they admit every type of Electromagnetic Radiation. It would be monumentally stupid to try to determine a star's luminosity by looking directly at it and trying to determine is luminosity by the colour. You need special instruments to detect ratio of the different wavelengths of starlight to determine its luminosity. Also the pixel measurements are straight up wrong. The Iris is not the size of the larger ring shown, measured to be 2.7m. Those are just the rings Thor was standing on. The entire Iris is comprised of the of a much larger array of rings, much larger than even Rocket's ships. The actual beam is the size of the hatch behind Thor which is much larger than the rings. In the movie, the iris was shown to be much larger than Rocket's ship. Not that this matters, because you don't need to calculate the force of the entire star because not all of the force of the star is acting on Thor. The beam is much larger than Thor, and only the radiation and particles that touch Thor's body is acting on him. So you only need the surface area of Thor's back.

A much more reliable calc is this one.