TS (Transport Stream) is a digital video format for saving video data on a DVD. It uses MPEG-2 compression on its video data, and the files come with a VIDE0_TS directory. TS files are straightforward on most computer video editing programs and media players.
Apple DVD Player VLC Media Player PotPlayer Audials One 2019, Roxio Popcorn
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