EdPuzzle is free for teachers to use. (There is a Pro Teacher level coming soon that will cost $6.50 per month and offers storage for up to 20 videos-lessons, unlimited sharing, and tracking of student progress with analytics.) It is easy to join. Once logged in, there are several video channels set up for browsing for material including YouTube, Khan Academy, National Geographic, TED Talks, and EdPuzzle, itself. There is a built-in gradebook and a place creating your specific classes where the videos with EdPuzzle enhancement will be used. There is a built in Help Center that includes several sections with specific information within that section--all clearly labeled. These include: Getting Started, Creating Video Lessons, Assigning Video Lessons, Managing My Classes & tudents, Managing My Students' Progress, Managing My Content, Account Settings, Tips and Tricks, Troubleshooting, and Free vs Pro. There is a search slot at the top of the Help Center page and a link for contacting Ed Puzzle folks directly.
The site and tools within are attractive and easy to start using. Once logged in, the limited buttons make it easy to see the available content and tools.