Crash Course
Crash Course Kids
It's Okay To Be Smart
Physics Girl
SciShow
SciShow Space
Animal Wonders
National Geographic
National Geographic Education
Veritasium
Periodic Videos
Amoeba Sisters
Objectivity
Minute Physics
Minute Earth
PBS Eons
The Brain Scoop
Smarter Every Day
Numberphile
Sixty Symbols
Deep Sky Videos
NASA
Jungle Jordan
Dr. Becky
Physics Fun
NASA
USGS
U.S. National Parks Service
Most U.S. National Parks have an Instagram account. A few notable ones are: Yosemite, Sequoia & Kings Canyon, Grand Canyon, Lassen, Yellowstone, Denali, Glacier, Rocky Mountain, Death Valley, Redwood, Olympic, Zion, Capital Reef, and Everglades.
Science Solved It
Science Friday
Science Brunch