For Movies:

You can directly start typing its name (For ex: The Avengers) and a quick suggestions will start coming for you just below the search bar and you can select from them.

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For TV Series:

Here also you can directly start typing its name (For ex: The Flash S03E07) and a quick suggestions will start coming for you just below the search bar and you can select from them.

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*Note: If there are no suggestions coming up for your query its either of two things, either the spelling of your file is wrong or this file is not updated in CatFiles.