Hi @agdali
Thanks for your comment.
It was not Albert Einstein who calculated the speed of light, but a Danish astronomer called Ole Røhmer back in 1642 by measuring the the time it took for one of Jupiter's moons (Io) to appear from the backside of Jupiter. The time of the occultation wearies by the distance between Earth and Jupiter.
More on that topic here:
https://en.wikipedia.org/wiki/R%C3%B8mer%27s_determination_of_the_speed_of_light

The video you are linking contradicts what you are trying to get across by the way.
Cheers, @erlendgroseth
For @Onebitnews