The video is pretty popular and being spread by science channels. Is the last bit about the cause of time dilation correct? I used to think like this, but came to the concoction its wrong, but seeing this video makes me wonder once again how could this be correct. If the video is true then - wouldn't this mean everything isn't truly relative? If the video is true then - wouldnt 50% of c would cause 50% of time? which does not match Einstein's equation on this.