Some devices don’t come with this program – but every single one should have it. It detects Youtube videos while browsing, and lets you use the program separately to browse the site and play them. A must have.
Android Tablets sometimes don't have access to the Android Marketplace. In this situation, the only way to load an application is manually. This website gives you a direct download link for Android APK files, and walks you through the steps to install non-market apps.