Bug overview description.
APNG files currently aren't being labeled as animated. Similarly to how GIF files aren't always necessary animated, it would be crusial to know if PNG file is.

What part(s) of the site page(s) are affected?
Post search pages.

What is the expected behavior?
Thumbnail states either ANIM or APNG.

What actual behavior is given instead?
Thumbnails show up similarly to static image posts.

Time of incident (if applicable).
-

Can you reproduce the bug every time?
Yes.

What steps did you take to replicate this bug?
- Upload APNG file.
- Make sure it has both animated and animated_png tags applied.
- Check the post by searching for animated.

Errors or other messages returned (if any).
Nope.