How does a transcript help you?
Search engines read text, not videos, not audio. Make your content accessible to everyone by adding a transcript to your content. SEO - search engine optimization - increases the quantity of traffic to your site which makes your channel a top result in the search engines, because we all know no one goes to the second page of the Google results. Having text also makes your content accessible to people who prefer to read or are in an environment where they can't listen, as well as to the d/Deaf community. It's easy to see that having a transcript will give your projects the enhancement they deserve.