My GCSE Science is a site that has video lessons and resources on Biology, Chemistry and Physics. They were developed for a specific curriculum and program, but can be used by anyone for these topics.
The videos are good and there are notes pages that go with them. The notes pages have images from the video along with space to write your own notes. The video listing has the length of the video also.
They are organized by subject and topic and the videos are hosted on YouTube.
This is good for students to use for review, missed work, and help, and for teachers to use in class or for absent students.
Here's some of the Chemistry and Physics videos. Click on the video or "Learn" to get to the video. "Notes" brings you to the PDF notes for the video.
Notes page example: