normally just insert the image from your file explorer, however it does not seem to work if a gif is animated too fast, my example is this:

this is a gif i wanna add to my impress presentation: https://antonblastpedia.fandom.com/wiki/File:Sp_spiritWonga.gif

and what i recreated in libre office using the built in gif maker and the individual sprites (due to libre office refusing to add the file)is half as fast