Problem with wallpapers

New to Android, picked up a cheap Chinese phone to try out. (Mijue M680/4.4.2) pretty happy so far BUT I can't get any of those cool animated wallpapers to work! The default one on the phone works, but anything else I try to install from the Play Store says it's installed...til In try to run it, then it says "App is not installed". It actually calls them Video Wallpapers on this phone and I wasn't sure thetre was a difference from 'Live' wallpapers so I tried both with equal results. If I try to run it from its icon some give me the settings screen but when I hit Preview I get a 'Failed to start' message. I can use videos I shot as wallpaper but nothing you have to install. What am I missing?