Storyline Online http://www.storylineonline.net
Storyline Online contains videos of children's books read by different celebrities. There are some fun stories here.
Teaching Channel https://www.teachingchannel.org/
Professionally made videos for every grade level, standard and subject.
Tween Tribune http://www.tweentribune.com/
High interest nonfiction articles. Multiple Lexile versions of each article are available. There are also quizzes for each article. Great for differentiation.
TED Ed http://ed.ted.com/lessons
Short Animated videos in many academic subjects.