You have many tabs: Esport, Music, Games, Mods
If you don't see it, perhaps can you check in params, there's an Addons tab, where you can search for games.
It's included in Twitch client
You can check on your bitbucket the content and result of your hook.
If I don't activate "Package all commits", nothing happens too (even with a tag...), but if I do, I see the webhook is working.