title: Webhooks/PubSubHubbub for other events such as super chat messages?
body: <p>I can't find anything on the Youtube Data API docs about setting up webhook/pubsubhubbub integrations for events other than uploading a video or updating video title/description. I see other services such as IFTTT have integrated triggers for super chat messages, channel membership, super stickers, new subscriptions etc. How are they doing this? Are they simply polling Youtube every few seconds to compare the data? I would have thought Google would have the same level of webhook integrations that Twitch has for example.</p>