First of all, I stopped watching the video when it says a second has 60 milliseconds. That is not true. And it is not relevant.
I can't tell if you live in Israel or were vacationing there. They do use PAL there, but I think you should probably forget about using PAL.
Here is my suggestion. Use your 4288X2848 image to create your sequence. Limit yourself to 24 frames per second and you will have a lot less work to do.
I think you are being tricked into seeing something the wrong way. When I open one of my images in the Source Monitor, it is usually set to "Fit". Change it to 100%.
When I have one of my images in the Program monitor, it is usually set to "Fit". Change it to 100%. Try this out. Pick a picture with something nice and sharp in the exact center of the image. Compare both monitors.
Here is a shot of my screen doing that. There is a file size limit here on the forums so you are only seeing a small part of both monitors. I don't see any blurring. Do you?
Edit: You are probably going to have to cut the frame size down to export it - for now. Just cut each number in half after upping the quality and setting the frames per second back to 24.. One of these days you may end up going back and exporting again - when Premiere Pro catches up and lets you export H.264 at that size.