Is it possible to to refit the freehub seal without using the special tool, if so how do you do it please?

EDIT: I was expecting a click when I put the freehub back on, like in the video, but I am hearing no such thing, is this right?

i just prod mine with a blunt screwdriver, working round until its all ‘clicked in’ as you say.

I just push the seal back in. No issues at all

It doesn’t really click into place