PornHubGif lined up 31 leg over gifs for you - every one free and on autoplay.
If third is your thing, start at the top row - those gifs match leg over closest.
Yes. 10 of the clips are vertical and the whole site runs fine on mobile.
Most loops are HD - the player serves the best quality your connection can handle.
They are matched by title and tags, and the closest ones are shown first.