WordPress makes it easy to embed videos into a post or page.
However, by default, WordPress doesn't provide an option for the width and height of the video.
This tutorial will show you how to change the height and width of your WordPress video embed.
UPDATE: If you want an even easier method, you can also check out the EmbedPress plugin. The link is in the box below ...
The Problem with WordPress YouTube Videos
You get done uploading your video and preview it. Oh no, it's too big or too small!
So you go to edit your video, but there's no option to change the size.
There's a simple trick to change the width and height. Simply click the Text button and now you can edit the code of the embed.
Look for the following code:
[video width="1280" height="720" http://example.org/your-video-url]
and change the dimensions within the width and height attributes.
Save when done and then preview your video.