Heidel Banquet AT HOME has ended. There were no codes on stream, various "rewards" will be sent to you via in-game mail (varies for different servers), make sure to collect them. I've replaced Twitch streams with VODs. A lot of interesting info was presented to us on the stream, but I think that some of decisions taken are quite controversial, so I'll refrain from commenting on it all completely (if you want my opinion on specific parts - feel free to ask me in this thread), but I'll say that if you haven't seen the stream and have some time to spare - it'll be worth it to check out VOD (just skip filling content, it should be fairly obvious what parts to skip).
Official KR stream:
Official JP stream:
Official EN stream:
For other languages official streams were streamed on Twitch and/or YouTube, so check out official Twitch/YouTube of your server for stream VOD.