The GeoGebraTube Chrome app gives you access to all of the materials that you would typically find on GeoGebraTube. Those materials include worksheets, tutorials, and lessons. You can also use the app to upload your own materials to GeoGebraTube.
The GeoGebra Chrome app allows you to do all of the things that you can do with the web version of GeoGebra. The benefit of the Chrome app is that you can save your work directly to Google Drive.
H/T to Guillermo Bautista.