You can see a white camera icon for record your screen

After clicking camera icon there is a popup showing options for share your screen, here you can see option to select tabs

Here you can see options to choose corresponding window

you can choose entire screen also. By clicking share button you can start recording.

You can view the white camera icon changes to green when its started recording, you can stop recording by clicking stop sharing,

In "Screen Capture" module you can view all the recorded videos,

You can see the corresponding date, time and video in the form view. You can also add description if needed.Also, you can play the video too,

You can record multiple screens at a time using this app, that is while recording entire screen you can record a single tab or single window according to your need by clicking camera icon.