Online videos are more useful to viewers when they have accompanying text. Any inaudible or unclear words will be easy to understand. They won’t end up wondering what the narrator or the character was saying. They can keep in step with conversations.
However, paying for transcription services can be costly especially if you already have a lot of videos in your archive. One way to make this less expensive is to use automated transcript services. These will analyze the audio and generate the text. It is also much faster than manual transcription.
Test the service if possible because some are able to provide greater accuracy than others. Saving money is useless if the results are gibberish. The text should be faithful to the speech. Read online reviews to learn about common issues and find the best service out there right now.