I just saw a Youtube video about setting the seat position for safety and comfort. Do you agree with the advice in the video? or other tips?
Some of these adjustments will depend on the car and driver. I think this fellow said he was on the short side, and the Swift is a small car not only on the outside -- it was scaled for people smaller than many occidentals. You need the seat near enough the pedals to know you can operate them all through their entire range without straightening your legs, so he is spot on for that. Thereafter, not everyone will be able to adjust the seatback so his arms can reach the wheel at 9 and 3 with a conspicuous bend in the elbow. I drove Swifts for years, but am full height. If I rested I held the wheel at 7 and 5 and rested the backs of my hands on my legs, it was one of the most comfortable cars I'd driven. I drive all cars with the seat all the way down, but if you were short enough that could cause problems. At the other end of the spectrum and depending on your height, you aren't going to be able to sit as upright as he does. You need to figure out what works for comfort and safety for you.
I now set the seat position to "flat" (I.e, the back and the front of the seat is horizontal). Is there any reason to sit at the lowest position. The video mentioned: 1. leaving at least a fist between the top of head and the car roof. 2. projecting the view ?? (I don't really understand that point at 3:53 of the video).
That won't work for everyone. In a Prius, I need the seat all the way down to get in, and there isn't going to be room for a fist between the roof and my head. On a track, you'd need enough room to accommodate a helmet. His point is that if you are low enough that you can't see the hood, your focus will be on objects a greater distance down the road, your choices being the road or the sky. Being low enough that the hood is obscured by the dash won't be possible for many, but it's hard to imagine anyone who has been driving for a while being distracted by his hood being within his field of view.