Do I need to animate the entire site in gif?

Question

css

You need to update the old landing page. It was decided to update some elements and make animation. Smooth sequential appearance of elements, etc. Accordingly, now there is an opinion that it is better to first make all the animations in After Effects, and then give it to the layout designer.
Tell me, who is engaged in the layout of animation on sites, is this really true or is it extra work and is it better to work with the layout designer right away?

Answer 1

We have a designer doing it!
Gives as video and as gif. On mobile html5 does not play, we replace the gif-oh.