New in the Subscriptions tab on iOS:
Tap a channel icon to see all of a creator’s newest videos without leaving the subscriptions feed.
It’s like a filter for your subs feed to see one channel’s latest videos at a time!
More info → https://yt.be/help/MK1B pic.twitter.com/WYBRp7bZ3P
Thanks for reaching out. Live streaming ability on your channel can be disabled for many reasons. Here's our Help Center article about live streaming restrictions & what you can do to enable it: https://yt.be/help/gok2 . Hope this helps.