Can't recognize ts file as video format

[SempakRangerGG]

Tapping them doesn't show any video player app

[mayhair]

This is because Transport Stream video files and Typescript code files have the same file extension, .ts. Material Files just decides to interpret all files with the .ts extension as Typescript files. (More technically, it sends the MIME type text/typescript instead of the proper video/mp2ts.)

[zhanghai]

Material Files uses Android's official extension and MIME mapping and unfortunately there's no good solution to resolve such a conflict. You can still use "Open with" then "Open as" to manually open it as video.