To look their best on any platform, videos should be a certain size and shape -- and every platform has different requirements it seems.

To make things simple, we display videos in the most commonly-used size ratio out there -- 16:9 -- which is the same ratio that Youtube uses for its videos.

16:9 is how we describe the shape of the video -- it's 16 wide and 9 high. In other words, whatever your video width is, the height should be 9/16 of that width. Here are some examples:

When your video has not been output in the correct ratio as described above, then our player will show black bars at the top & bottom, or on each side, depending on the video size.

Here's an example of a video that was rendered at the wrong size - 1830 × 946, which is not high enough.