Use case or problem
If a video has large resolution, embedding it into md doc, it may be very large in the preview. So a way to control the video frame size is needed.
For now we can use syntax
![AltText](image.png) to control image size like this:
![image|100x200](<assets/demo image.png>), so I suppose this could be also implemented to a video like these:
Current workaround (optional)
HTML label. Not handy to use.