Users of a Samsung Galaxy Apolly GT-I580x may have noticed that, by default, there's no YouTube player present. This basically cripples the phone not being able to play YouTube videos.
A standalone version of the application was released by Google, but can only be installed on Android 2.2 (Froyo), really disappointing for 2.1-users.
Fortunately, someone has ported the YouTube player to 2.1 by removing some 2.2-specific function calls and replacing others that are required by the app.
To install it, download the attached Android package onto your phone and install it. You may have to install Apps Installer from the Android Market for this to work.
The application works very well but has some known issues when signed in.