Live wallpaper 'Water with autumn leaves' disappeared with Android 5.0.2. I found it, but safe to download?

I love this wallpaper and want to go on using it. It disappeard with the upgrade to 5.0.2.

I found it at a link which I could disclose if the forum would let me post it. The front end of the link is gallery.mobile9.

I'm about to upload it using Astro File Manager but there's a warning about risk, I know how to override that, but as a newcomer to smart phones, I don't know if I'm about to do something really stupid.

What do you think - is this reasonably safe? The app does not seem to exist on the app store.