For most of these calls, you're basically just passing along the same arguments, so you could shorten the number of lines by calling:
```
var chatManager = Liferay.Chat.Manager;
var videoManager = Liferay.Chat.VideoManager;

A.on(videoManager. _onPanelClose, chatManager, '_onPanelClose', videoManager);
A.after(videoManager. _onAfterUpdateBuddies, chatManager, '_updateBuddies', videoManager);
A.after(videoManager. _onAfterUpdateSettings, chatManager, '_updateSettings', videoManager);
```

(passing the last param will set the context of the function, so the `this` will point to that object)

Also, I would change the method names from `_onAfter` to just either being `_on` or `_after` depending on when it's called.