Can not find Quick video publish box!

I installed the plugin but can find “Quick video publish box”
Please tell me what I am doing wrong!
Chieu
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This allows a Brighcove Video Cloud video to be easily embedded by its player URL. It does not need a Video Cloud Media API key, so works with any Brightcove account edition.

First get a link to the video and player you want to use from the Video Cloud media module.

Select a video
In the Quick video publish box on the right, select a player
Under Copy publishing code, select URL
Copy the URL
In the post editor, add the the URL surrounded by [bc] and [/bc], for example:

https://www.ads-software.com/plugins/simple-brightcove-player-embed/