Explain settings of video creation

Can you please explain these in simple words?, all I know here is the negative prompt and seed.
it says 1 line=1 window, does this means one line is one scene?
Another question, what is the difference between creating the video using frames tab and multi shot tab.

It would be great if there is a detailed explanation about the control video/fram injection option and all its settings.

Your system (OS / GPU / RAM / VRAM / etc.)
Windows 11/ RTX 5070 TI, 64GB RAM, 16 VRAM