Twitch emotes top out at 112×112 in manual mode, while Kick wants 500×500. Scaling a 112 px emote up nearly 4.5× will look soft; export from your original artwork when you can. Animated GIFs at 500×500 are large, so the resizer fits them under 1 MB by trying fewer colours, gentler dithering and pixel reuse between frames before dropping any frames.
Yes, as GIF. Long or detailed GIFs at 500×500 often go over 1 MB; the resizer fits them under the limit and shows how close the result is to your original.
I made my emotes for Twitch at 112×112. Will they work?
They will be scaled up to 500×500, which softens them. Start from your largest original artwork if you have it.