The Windows Phone app which has gone free next as myAppFree app of the day is Video Navigator Pro.
Video Navigator Pro Details:
Video Navigator – video player with Extra features! No features for money, everything is free! This app is still in development mode! Please, support development by giving good reviews and reporting to me about error that you find!
1. Supports all video formats supported by Windows Phone.
2. Supports MKV (Matroska) and FLV
3. Supports audio codecs and dual-audio.
4. Supports subtitles: SRT, SUB, SSA, VTT + built-in MKV-subtitles!
5. Easy to use and customizable interface in Metro style.
6. Easy folders navigation!
7. Playback speed controls!
8. Adjusting brightness.
9. Zooming videos (use pinch to zoom gesture)
10. Adjusting video size (3 modes)
11. Fullscreen playback for phones with on-screen navigation bar.
12. Share videos just from the app!
13. On-screen volume control.
14. Always saving position, where you stopped.
15. SD Card supported!
16. Software decoder for unsupported files!
17. Gesture controls! Just double tap your screen to switch between gesture playback controls and gesture zoom controls!
18. Landscape and portrait video playback
19. Customizable subtitles font size.