Update media docs

Author: caio1516

docs/capabilities/server/media-uploads.mdx

@@ -22,7 +22,7 @@ Enable the `media` permission in your `devvit.json` file.
 ```
 
 ## Using media uploads
-On the server, you can pass the URL of any remotely hosted image (even if its not hosted on Reddit) to the `media.upload` function. The media function will return a Reddit URL.
+On the server, you can pass the URL of any remotely hosted image (even if its not hosted on Reddit) to the `media.upload` function. This function will return a Reddit URL. Both HTTP and data URLs are supported.
 
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@@ -50,9 +50,12 @@ On the server, you can pass the URL of any remotely hosted image (even if its no
 
 
 ## Limitations
-Supported file types are:
-- GIF
-- PNG
-- JPEG
 
-Maximum size is 20 MB.
+The following file types are supported, along with a corresponding maximum size limit:
+- JPEG, PNG, and WEBP: up to 20 MB
+- GIF: up to 100 MB
+
+### Notes
+
+- When uploading through a data URL, the size limit is 7.5 MB regardless of file type due to request size limits.
+- When uploading a WEBP image, it will be converted to JPEG. As such, the Reddit URL returned points to a JPEG image.