Is it possible to change the color and size of the subtitles?

The subtitle color and font size can be changed from the settings on each OS.
Note: The method to make changes may differ depending on the OS version and device type.

iOS

1. Open iPhone/iPad settings
2. Select "Accessibility"
3. Select "Subtitles & Captioning"
4. Select "Style"
5. Select your preferred style

Android

1. Open Android settings screen
2. Select "Accessibility"
3. Select "Captions"
4. Turn on "Captions"
5. Select your preferred style from "Subtitle sizes and styles"

Windows

1. Select "Start"
2. Select "Settings"
3. Select "Ease of Access"
4. Select "Closed Captions"
5. Select your preferred style

Mac

1. Open "System Preferences"
2. Select "Accessibility"
3. Select "Closed Captions"
4. Select your preferred style
5. Terminate your browser and restart CL