All video tutorials belong to one of those three categories:
1. Free Samples of each Channel (accessible for every user on the app)
2. Subscriber Content of each Channel (accessible for users who have unlocked that specific Channel)
3. Premium Content (accessible for everyone who has a premium subscription)
The unlocked symbol symbolizes content that is accessible for you
The locked symbol symbolizes content that is not accessible for you.
Each Channel has its content that is only accessible for users who have unlocked their Channel after purchasing a subscription. To access more content than the free samples from Channels than their free samples, you need to buy a subscription first and then unlock/choose the Channel/Channels in the UNLOCK SCREEN of the CHANNEL OVERVIEW.