How do I make gifv pictures play?

How do I get gifv pictures to play on my wife's Z30? They play for me on my Z30 but not my wife's or my parent's, we all have a Z30. If I recall correctly, I followed a thread years ago and downloaded some files that enabled my phone to play gifv pics. For the life of me I can't find any mention of this on Crackberry or doing a Google search.

I keep trying to share funny cat gifs with my family and they never get to enjoy what is the greatest Internet phenomenon, funny cats! Help me get their phones fixed please.