This video explains and shows the new features found in the iMovie 10.1 update.

iMovie 2.2 Update for iOS 9 Overview: https://www.youtube.com/watch?v=mCwmmw5R31c

iMovie 10 – How to Fade an Audio Track In or Out: https://www.youtube.com/watch?v=uwBRn35xJ4Q

Full changelog from Apple about what’s new in iMovie Version 10.1:

• Create and share movies at stunning 4K resolution (3840 x 2160) on compatible Mac computers (1)
• Create and share movies with 1080p HD video at 60 frames per second for smoother, more true-to-life action
• Import movies and trailers from iMovie for iOS (version 2.2 and later), so you can start editing on an iOS device and finish on your Mac
• Redesigned Media view lets you see more of your library while browsing videos and photos
• Projects view makes it easy to find and open your movies and trailers
• Tabs in the Browser give you faster access to titles, backgrounds, transitions, and music while editing a movie
• Option to hide Browser while editing a movie
• 10 additional video filters from iMovie for iOS
• View pixel-for-pixel 4K video while editing a movie on iMac with Retina 5K display