Thumbnails in the /v/ webm thread were not being lazy-loaded as seen in the screenshot. It loads all thumbnails on initial load, whereas it should be like the zchan screenshot - loading only whats visible and then making requests as the user scrolls down. According to >>579206 "8moe does actually do lazy loading but for some reason it's not working for video thumbnails. If you're on tor it's specially noticeable because due to the latency you can see the thumbnails pop in for images all the time but for videos they're actually preloaded". This is likely the reason why the webm thread is unusable for mobile and will cut down load time significantly for big threads like this.