MacBook Air display dims/blacks out during video on battery

"MacBook Air display dims/blacks out during video on battery: When I watch a video program on the New York Times website, with my MacBook Air on battery, after 30 seconds or so the display will dim, then after a bit more time the display goes black. How do I prevent this from happening?"

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Turn Off Low Power Settings:

Go Here: Change Battery Preferences on a Mac Notebook - Tahoe - Apple Support

1. Go to: Apple menu
2. Select: System Settings
3. Select: Battery in the sidebar (You may need to scroll down.)
4. Select: "Never" on (top-right) for "Low Power Mode"
5. Click: Options... button (bottom-left)
6. Toggle Off: [top two items]
7. Click: Done button
8. Close: System Settings

Screenshot of what to Toggle Off:

You are welcome. Excellent job troubleshooting this!