This userscript automatically likes videos of channels you're subscribed to on YouTube, after you've watched at least half of the video.
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This is a userscript. To use it you'll first need one of the following browser extensions:
Tampermonkey Greasemonkey Violentmonkey Userscripts 
Link (Beta) - Link (Beta) 
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- Then install this script from one of the following links:
- GitHub (Recommended)
- Greasy Fork
You can configure the settings by clicking the 'Settings' button under 'YouTube Auto-Liker' in your userscript manager.
| Setting | Description | Default |
|---|---|---|
| Debug mode | Log debug messages to the console | off |
| Check frequency | How often to attempt liking the video | 5000 ms |
| Watch threshold | The percentage of the video watched before liking | 50% |
| Like if not subscribed | Like videos from channels you are not subscribed to | off |
- Add settings:
- Retries - How many times to retry liking upon failure.
- Whitelisted channels - A list of channels to always like the videos of, even if you are not subscribed to them.
- Blacklisted channels - A list of channels to never like the videos of, even if you are subscribed to them.
- The userscript itself was inspired by this one by JoeSimmons, which hasn't worked since 2015
- The debugger code was adapted from this Stack Overflow answer by arctelix
- The settings interface uses GM_config by sizzlemctwizzle