The GIFs in the form are visible in Android devices but not with IOS

For the form I created I used gifs as a part of the survey responses. For those who have tested the survey for us the android users were able to see all the gifs while those with Iphones were not. Any idea how we can fix that so that the survey is available for everyone? 

you can email me back at Caleb.hoover@cru.org

The GIFs are downloaded online as .webp format, which Safari does not support yet up to this day. You have to convert it first before uploading it back in the form. You can use this tool such as this one https://ezgif.com/webp-to-gif to convert.

Here's an example of the .webp file in the form:

Thanks