WTV (Windows Recorded TV Show File) is a video format recorded using Windows Media Center (WMC). WMC is a program for recording TV shows and playing multimedia content. WTV uses the MPEG-2 compression standard for videos and Dolby Digital AC-3 or MPEG-1 Layer II for audio. Some WTV files might include metadata as well as DRM protection.
DRD Systems VideoReDo Bigasoft WTV Converter CyberLink PowerDVD 17 Microsoft Windows Media Center
MP4 (MPEG-4 Part 14) is a video container format based on QuickTime MOV. But unlike MOV, it adds support for other MPEG features. MP4 supports video (MPEG-4 Part 2 and MPEG-4 Part 10/H.264), audio (MP3, AAC, SLS, TTSI, and ALAC), and subtitles (MPEG-4 timed text). It’s this codec combination that gives MP4 its flexibility.
Windows Media Player VLC Media Player, Apple QuickTime Player 5KPLayer