**1. Cause of Loss of Functionality** The cause of this loss of functionality is likely due to the way VLC Media Player interprets VTT files. **2. Complexity of the VTT Format** The VTT format is relatively complex and can be difficult for some video players to interpret. **6. Effect on Perceived Subtitle Quality** The presence of the "Text translated by Machine" label can give the impression that the subtitles are of lower quality, even if the translation itself is correct. This can affect the overall perception of the video.