There’s enough space to add some sound bars to the video to make it even clearer it has sound. They don’t need to be accurate, just moving.<p>Also, I haven’t tested but it seems like uploading an image might be required? If so, consider reading the metadata from the file and extracting the artwork, if there is any.<p>Finally, instead of a fixed colour background you could try making it the whole image, then have a “cutout” in the middle which spins. Might even be able to add some white overlays so it looks more like a vinyl.