To watch all of the snippets in a project:
iOS app
Tap on the Play button at the bottom of the project screen.
This will open the "Choose Dates" drawer.
Select "Customize".
Tap "Select (All)".
Tap "Add to Mash".
Android app
Tap the "Play" button at the bottom of your project's screen.
Tap "Choose Dates".
Select "All".