This refers to Flash ActionScript commands, so unless you know what you really want to do, you do not need to enter anything. Defining mouse interaction would require Flash/ Flash Catalyst, anyway. AE doesn't do that.
What do I use "chapter an web links" - when entering a URL, it is probably to go to this page?
Chapters are just meta-info you can jump to and have a fancy title displayed. Whether those links could be clicked, is up to the player skin. Normal URLs should open every time automatically, when the playhead reaches such a mrker/ point. All you should need to do is input it correctly.
Diligent search on this topic turned up only this. I cannot get the "open every time automatically" to work. Here's the setup:
No layer selected
Position play head in AE comp
Click Layer, Add Marker
Click on marker, go to Settings
Enter in URL: www.etc.
(Have also tried http://www. etc.)
Render in AME with Quicktime, DNxHD, Windows Media but...
No joy. (What I'm expecting is that when the video is played and the playhead hits the time at which the marker was set, the website spec'd in the URL will open)
Guess I'm not inputting it correctly. Please Help.