Starting from
WorldServer 11.6.1, all types of subtitle files (SRT, VTT, STL and SBV) are supported by the
Subtitles Formats File Type, in alignment with Trados Studio.
In earlier WorldServer versions (including 11.6.0),
*.SRT is the only subtitle file format officially supported via the
Subrip File Type.
This article might be useful if you work in an earlier version of WorldServer and you would like to be able to segment VTT files with one of the available filters:
WorldServer filter configuration for Segmenting VTT subtitle files in WorldServer version prior to WorldServer 11.6.1