These YouTube channels are perfect for learning new phrases and clarifying grammar concepts. They're also a great way to learn about Chinese culture. As they're sometimes spoken in Chinese, they're useful for immersion, but do be sure to immerse in other materials - as these videos are often spoken at a slower pace than normal conversation.

Mandarin Corner

Channel : https://www.youtube.com/c/MandarinCorner2/featured

A Walk in the Chinese Countryside : https://www.youtube.com/watch?v=-RHIheaJU_U

How Much Chinese History Do Chinese Really Know? : https://www.youtube.com/watch?v=_Q_T2M-DCac

Harbin Mandarin

https://www.youtube.com/channel/UC8sCINlHlbkxEdDKQRSHK_w

Yoyo Chinese

https://www.youtube.com/c/YangyangCheng/featured

Everyday Chinese

https://www.youtube.com/c/EverydayChinese/featured

Chinese with Xiaoxi小溪中文

https://www.youtube.com/channel/UCLbWUyeSw2FwpnvbbRBjDIQ/featured

Grace Mandarin Chinese

https://www.youtube.com/channel/UCC_fdR7zZ_5SU--xuOrEdKw/featured

Yimin Chinese艺敏中文

https://www.youtube.com/channel/UCTwUbtaSPl13qpT6sKB3dwA

Ask Andy

https://www.youtube.com/channel/UCPt7tHsguliUnpc9HJuaqOg

ShuoshuoChinese说说中文

https://www.youtube.com/c/ShuoshuoChinese说说中文/featured

Chinesewith Jen

https://www.youtube.com/channel/UCTv3z3XNHB9SHfSM7XLSZCQ

Speak Chinese with Reshine

https://www.youtube.com/channel/UCa_KQsZKGxPUx5DcWnP7Kaw

Vica Chinese

https://www.youtube.com/channel/UC9lI3GcZkJDgdZSeuR6rt5g

KEYs to Chinese

https://www.youtube.com/channel/UCljtbpHGDZxlMB7-T3mExJQ/featured

Learn Chinese with Dolores

https://www.youtube.com/c/LearnChineseWithDolores/featured

SyS Mandarin

https://www.youtube.com/channel/UCUjFsQAUUS1IFM7oyUXeB1g

AvenueX

Channel : https://www.youtube.com/channel/UCAJa5VlzzRq7Ebr-IQbXqyA

Learn Chinese (Playlist) : https://youtube.com/playlist?list=PLktmQtBm6n4EdjQODutRkMhmABA9hoA8h

GoEast Mandarin

https://www.youtube.com/c/goeastmandarinchinese/featured

Learn Chinese with Litao

https://www.youtube.com/channel/UCjf10tuGdICcczoW05Iqe0A

Learn Chinese with Yi Zhao

https://www.youtube.com/channel/UCPS5lOyQ2HfaYgapBV22H0A

Learn Chinese with Rushan

https://www.youtube.com/channel/UCPK1A_9K7W8yx1d5z-fevXg

Xiao Min

https://www.youtube.com/c/XiaoMinMandarin/featured

Vivian Zhang

https://www.youtube.com/channel/UCr7sTRS6n____iEx6QMdTmQ

Chinese with Jessie

https://www.youtube.com/c/ChinesewithJessie

听中文学汉语 Chinese Listening & Learning

https://www.youtube.com/channel/UCVqsKxS81nVygFXncefczOQ

Chinese with Ting

https://www.youtube.com/channel/UCgqwvezE0xmsdnUuxQE-7OQ

If you're interested in learning Chinese, there's a How to Learn Languages guide :

How to Learn Chinese