I took a look and nothing was immediately obvious, it is possible it is a bug and @cyberdave could take a look…
Another possibility is that it is to do with the link to the video and a workaround is to use a custom html element with an iframe inside it as follows:
Hi @reejiang, the video size has a fixed aspect ratio, so changing the dimension of the video width, would also change it’s height. I made a video suggestion for one alternative structure/styling on the video: