Which Android app should I use to play local video files from my phone that won't open in other media players?

XPlay Browser is a multi-functional app that excels in handling local video files where other media players might fail. It combines a basic file manager with an integrated video player that supports a wide array of formats, including MKV, AVI, and FLV, which can be problematic for standard players. The app automatically scans and indexes video files stored on the device or external SD card, presenting them in a clean library view. For users dealing with a mix of downloaded content, its built-in player offers essential controls like variable playback speed, subtitle file loading, and background audio playback. However, some reviews indicate that the subtitle rendering can be finicky with certain file encodings, and the user interface, while functional, isn't as polished as some dedicated video player apps. The browser functionality is a notable bonus, allowing direct downloads from supported sites which then feed into the same media library. It’s a practical, all-in-one solution for managing and watching a personal video collection without constant format compatibility headaches.