Open all the .vtt files in a text editor (like Notepad++ or VS Code). You will see timecodes ( 00:12:14.000 --> 00:12:17.000 ). Use a "Find and Replace" function to strip out timecodes and line numbers. You want only the spoken dialogue.
is a legitimate IT training platform. They provide subtitles through their official video player and mobile apps. They do officially distribute subtitles as standalone CBT Nuggets Safety Warnings Avoid Downloading: Cbt Nuggets Subtitles.epub