| channel | Searches only YouTube channels
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| playlist | Searches only YouTube playlists
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| movie | Searches for full length movies
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| rental | Searches for movies that cost money
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| partner | Searches for video uploaded by YouTube partners only
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| @username | Searches videos by a specific user
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| allintitle:words
| searches only in the video's title
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| this week, today, this month | Search for videos uploaded in the given time frame
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| hd | returns only HD quality videos
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| cc | only videos with closed-captioning
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| 3d | returns only 3D videos
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| long | returns videos that are 20 minutes or longer
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