My understanding of relativity is at the beginner level, so please bear with me to help a beginner to understand. Something which I don't understand is consider if you travel close to the speed of light you will notice effects occurring, for example in this video. https://www.youtube.com/watch?v=-CIs3jOnfiM it says that close to the speed of light you will see distortions.
Now it is also said that there is no stationary position, everything is moving relative to other objects. However, lets say there are three people, one is myself, I sit still. Person A and B are sitting next to me then they go off in opposite directions from me and exert exactly the same amount of energy (thrust) for the same amount of time to accelerate away from me. Both of them came close to the speed of light, of course in opposite directions to each other. Then they came back to me to report their findings.
Could it be that person A experienced more distortions than person B, when they were travelling close to the speed of light? Would this indicate that I am therefore not actually stationary, but in fact I was moving some speed relative to the speed of light?
What if then I set off at a high speed with my 3 friends together, we are all travelling together in the same direction, at what we think is half the speed of light then conduct the same experiment. Wouldn't then at least one of them person A or B come to experience "effects" before the other? Of course one of them would get to the speed of light faster than the other right?
When I said "effects" I mean what is explained in the first video at Youtube.
If person A and B experience different degree's of "effects", wouldn't that indicate that there is really a stationary frame of reference?