How to Show Image Dynamically with RecyclerView

Hey Koders, I’m Trying to Create a Grid List with Card, Image and Text. So I got the list of mp4 file from my Device and stored in a Varible.(Using File Extension by @Taifun ) Then I created list of Card and Image(by @zainulhassan Recyclerview Extension). I’m Trying to get Thumbnail of mp4 file in every Image cooraponding. The Problem is Image is not showing also sometimes it just getting crashed. List Feel so Lag.
Here is what i wanna achieve

Here is what have i tried.
blocks (2)