From a recent captioning (aka subtitling) gig I did for a client, this comprehensive documentation will help you add subtitles to your own videos online. Uploading the video and the script Upload your video to your YouTube account in Private mode. (I use the private mode because I'm doing it for a client. If it's my own video I will switch to the public mode.) [ 664 more words ]
https://www.videolane.com/add-youtube-subtitle/
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From @adrianleeyc