To get there, Click bulbs in navigation bar. Next click the “Video Channels” tab.
You'll be shown a list of featured channels with top videos for your particular subject area. Clicking into any of the channels will filter for just those videos. If you click “Use” on any of the pre-made bulbs, you can check out and adapt any of the pre-made bulbs that other teachers have created with that same raw video.
See this video for a full walkthrough of Video Channels: