You can install Animate and other Creative Cloud apps on up to two computers. If you want to install it on a third computer, you'll need to deactivate it on one of your previous machines. Learn more about activating and deactivating Creative Cloud apps.
The HTML5 Canvas document type provides native support for creating rich and interactive HTML5 content. This means that you can use the traditional Animate timeline, workspace, and tools to create content, but produce HTML5 output.