In addition to the ones mentioned already:

AJ&Smart - All things Design Sprints - https://www.youtube.com/channel/UCeB_OpLspKJGiKv1CYkWFFw

Charli Marie - Designer at Convert Kit - https://www.youtube.com/user/charlimarieTV

Zimri Mayfield - Design maybe questionable but fun guy to watch - https://www.youtube.com/channel/UCbqd2YmFeHMwxlj4NcN5zPQ

Will Paterson - Amazing logo designer and handlettering artist - https://www.youtube.com/user/breakdesignsco

MDS - Not a lot of content but still some cool vids - https://www.youtube.com/channel/UCYMKd37bdxI-qj3f3z6U6_g

I would love to see something from Jony that is identifiable as an Apple product. If you're working for one particular company you're almost bound by its constraints like the brand that needs to represented or the stakes other have in the company. can't wait what Jony does if he's freed of that.

I don't really get why some people get so riled up for the the new Gmail UI. It might take some time to get use to, but in some weeks the buzz is over again.

We don't know what Google plans for the future of Gmail. Maybe the UI makes way more sense later on when new features are shipped. The redesign is part of getting it ready for the future.

The old UI hold up for like 7 years. And to me it looked a bit dated.