How to embed a video from a website so that it is in portrait orientation?

Question

css

The question may not be well worded.
The question is not about how to download videos from the site.

I want to insert a video into a WordPress post, but so that it is vertical in size and plays without black bars on the sides, because the built-in video player in WordPress is terrible.

Is there a way to make a responsive div with a maximum width and fit the video background in there?



layout experts, tell me pliz.
Those. it is necessary that only this area selected on the screen be visible.