@tanya53
Gif uses a color palette that can hold up to 256 different colors ( compared to 256 x 256 x 256 > 16 000 000 in an 8 bit JPEG for instance).
Resolution and frame rate also matter for the finale file size, but you can first make a GIF and then optimize it to reduce the file size and compare the quality with the original. (At least in the online Gifmaker I use, which is called Ezgif. That one works really well, but I have not tried any others, so I can’t compare it…)
It doesn’t have to look pixelated and the blurriness mostly comes from the lossy compression they use, but you can adjust the level of compression to minimize the blur.
