I tried on a video that I have already verified it has an SRT and VTT file, but the program reports:
Error code: 0 – A connection to YouTube was not able to be established.
Check your internet connection and try again.
My Internet connection is fine, and I can view the YouTube video, so TranscriptSnagger is somehow being blocked, and thus offers no value at all unless it can clarify how it connects and what the possibilities could be when it cannot connect.