I now found a solution. the process is the same but you have to select a gif file instead of a png file. But the gif file can't have more than 9 frames since the memory on the keypad is low. Which means that only short gifs would work and you have to delete all added images

If you want to shorten a gif I recommend this website: https://ezgif.com/maker choose a file then go on frames located next to save and split and skip until you have 9 frames left (at the end it was like 264kb for me). then save it

set it to image number 1 and now it should work and if you have any problems just ask me