In your video library click on the video you want to embed. The video detail page will show.

Click on Actions and choose Get page embed code. Pop-up window will appear.

Now you can pick either Responsive or Fixed option. The recommended default is Responsive, which means the video will adjust its size according to the container you insert it into. In case you need a specific size of the video, you can choose the Fixed option and set the desired width and height of the video.
Click on the Copy button. Now you have the embed code in your clipboard.

Go to your HTML page editor and paste the embed code where the video should be placed.