How to restrict users to upload only certain Image or Video Formats in File uploader

We would like to allow our users to upload only the following formats (.jpg, .png, .mp4) in the file uploader.

How do we restrict the same through bubble, Also I would like to restrict the pixel size of the image to 600*600.

Can someone help me with a solution for the same? The file uploader plugin doesn’t seem to have a default
option to restrict formats

Thanks in Advance!