Gif: "how to you add a real .jpg image layer on the video and not do a layer image copy of the video"

i took the exact same shot in good quality and id like to apply it to the cinemagraph. I would add the layer mask after !'thanks youuu via /r/Cinemagraphs https://www.reddit.com/r/Cinemagraphs/comments/6igm74/how_to_you_add_a_real_jpg_image_layer_on_the/?utm_source=ifttt