Number 10: Sleep History, This niche is bedtime Netflix for history lovers. This channel gained over 1 million views and 32,000 subscribers by uploading just 36 videos. That's less than one video per week, yet they've built a dedicated audience that returns night after night. Their most popular video alone has pulled in over 500,000 views. Even with a conservative $5 RPM, that single video generated around $2,500 from ads alone. And that revenue continues growing because history content doesn't expire. Creating this content is surprisingly simple. Use Claude or ChatGPT to generate historically accurate scripts. Then use ElevenLabs for calming, soothing narration. For visuals you can use Meta Ai to generate unlimited free images and video. And the best part, No fancy editing is required.