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I am experimenting with Live Stream of unrelated channel topics on YouTube, but YouTube sends notifications to all subscribers and few are unsubscribing because of that.
How can I disable sending notifications to subscribers of a live steam? This is possible while uploading a new video on YouTube but not while creating Live Streaming. Is there any workaround?
I was also searching for this in vain. But I found out from the youtube blog that the right to livestream is reserved for "content partners whose accounts are in good standing." So you need to become a content partner to livestream as of right now. You can sign up to become a content partner at http://www.youtube.com/yt/creators/partner.html
To answer your question "So it is open for everyone?", No. It is not open to the public yet. They are beta testing with their content partners.
Source: http://youtube-global.blogspot.com/2011/04/youtube-is-going-live.html
I had the exact same problem: I couldn't get Youtube notifications to work the way I wanted.
I can't help much on the "new comment" notification front, but I do have an alternative solution for receiving "new upload" notifications. I was so frustrated that I added Youtube to Zapier myself.
I have a Zap set up that sends me an SMS whenever a video is uploaded to a certain channel. You could use this Zap to send you an email notification for new uploads.
Best Answer
There is actually a workaround. Instead of using the "default" (persistent) live stream of your channel, use the "Live Control Room" to create a new stream. That will give you the possibility to uncheck the box next to "Publish to subscriptions feed and notify subscribers", which was grayed out when you used just the default persistent stream. But not sure whether it is automatically enabled after the video is published.
Another option, using the default persistent stream, is checking the box to set the created video as "unlisted" (you can keep the live stream public while the created video is set as unlisted after your live stream finishes), then uncheck the box "Publish in subscriber's feed and send notification", and after that set the video as "public". I can confirm that, in this case, the box remains unticked permanently.