While your video is generating, you can continue working on other projects.

All you have to do is, minimize the video generation pop-up.

It could take a few seconds for the minimize icon to show up.
​
To see the progress of the video generation, please click on the bell icon on the top right.

Once the video is generated, you will see an In-App notification/pop-up as well as receive an email, if notifications are enabled as in the screenshot below

Please see, clicking on the 'x' on either of the screens will stop the video generation.