I mentioned this in a comment but I figured it would get lost there.
The recent update means redgifs videos now load (yay) but reveals a new problem: videos cannot be saved in-app. Attempting to do so (with file permissions enabled) instead saves a tiny file with the same name, but none of the data.
As redgifs disallows saving from their site in-browser, this effectively makes redgifs content unsaveable.
Any solution or workaround would be appreciated.
New update fixes redgifs issue! Thanks Neko!