Had there been a second season of Angel Beats, this would've been a perfect teaser. Instead, Angel Beats!: Another Epilogue is just two minutes of filler that didn't really need to exist to begin with. The art is the same as with the original Angel Beats, however; unlike the original, Another Epilogue lacks any plot and real substance.
I didn't even know this existed until I saw someone's do a review on MAL and I definitely think I was better off without this one. The original ending of Angel Beats was enough to leave me satisfied. Unless there is a proper second season of the show, Another Epilogue was pointless. I would not recommend anyone to watch it.
