The McTube app gained popularity for its YouTube video downloading feature, named "Cache" to mask the fact that it can download videos from YouTube, against their Terms of Service. They were forced to remove the feature after YouTube requested them to. The feature was removed to prevent the app from being removed entirely. This led to the feature being disabled for many users, usually those who download it fresh from the App Store. It turns out, caching can be re-enabled with a plist file. The feature has not been stripped from the app's code, and can be brought back. You can download McTube fresh from the App Store, and download this plist file here: https://mega.co.nz/#!XFF2DRTR!GyE8nruK-S1x_UCVnMNYF9EwPMyyn6KOYRNfcni5_UA Place this file into the Library/Preferences folder of the McTube app using iFunBox on Mac or PC. And you shall have caching once again. To cache videos in the newest 5.0 update, you have to tap the area directly to the left of the gear icon that changes video quality, since it is not a supported feature anymore. It still functions normally, allowing you to choose the quality of the download. This is likely to hide the fact that the feature still exists. The Quick Cache (+) buttons work, too. Please report successes or failures.