There is no specific "best answer" for this problem, as it appears to be a collection of error messages related to crashes when trying to change video formats in an iOS app. However, I can provide some general guidance on how to approach troubleshooting and resolving similar issues.

Resolving the Issue of Selectable Cells in Custom Table Views with Multiple Sections

Understanding Apple's iOS App Development Guidelines for iPad Compatibility

Implementing Custom Section Management in iOS with Page Views

Understanding the EXC_BAD_ACCESS and Zombie Objects in iOS Development

Mastering Table View Editing in iOS: A Step-by-Step Guide to Customizing Cell Layouts

Viewing Core Data within Your App: A Custom Framework for Efficient Management of Persistent Data

How to Create a Universal App in iOS: A Step-by-Step Guide for iPhone and iPad Compatibility

Understanding iOS Application State Notifications and How to Clean Up Properly When Terminated.

Disabling Keyboard Notifications in UIWebview: A Step-by-Step Guide