BREAKING NEWS: video editing software were released at least 15 years ago, let me find some time and I'll shoot, edit and send you a movie of a Mehran doing 0-100 in 4 seconds. I could do that with a donkey kart too but there is no speedo meter, I can use my GPS, if that is acceptable to you
Actually, a video is just a series of images, so if you agree that images can be edited, then why can not one edit images in the video stream and replace them
Google on how Mr. Walt Disney created the early cartoons may help you.
I suggest you take a ride in a Swift Gtti, Suzuki has manufactured the most powerful 1000cc engine ever, but that is not the one used in the new cultus. And as automatic cars are not designed for racing, new automatic gear boxes come with safety mechanisms to avoid shifting to a lower gear at a high speed, hence, a bit of delay maybe half a second is introduced by the computer checking a safe downshift, but I do not believe it will not upshift at the right time, maybe you need to learn controlling the shift with the accelerator pedal, which is a FEATURE in automatic cars. But don't worry you have 2 years to learn.
Finally, you do not need to shout in the forums, everyone has the right to express their opinion in a non offensive way, you just sate some facts and do not try to convert everybody or kill the infidels and vice versa have the courage to accept the facts with reasoning stated by others. Nobody treats any new kid here non-serious but some people make there own reputation, ask anybody here about "farazfa". Or search his/her posts and you may understand.