The ability to create educational courses and have multiple audio tracks that make it easy to present content in multiple languages is one of the things that is being worked on by the company. Some of the features are still being tested, so they aren't necessarily available to everyone yet.
The company says that it is testing a feature that will allow you to search in a video. If you click on the "search in video" button, you can type in a phrase to see if it shows up in the audio transcript. You will be able to see some context and tap on the timecode to be taken directly to the moment where the phrase is said if it is.
Being able to search through a video's auto or manually generated transcript isn't a brand-new feature - you've been able to do it on desktop for quite a while In October of 2021, it was announced that people would be able to do the same thing in its mobile app. The ability to view the transcript on mobile devices isn't widely available.
The company also announced a feature called Courses that will allow creators to sell access to a series of educational videos as well as supplemental materials, which will be available under the relevant videos. While Courses may be a way for YouTubers to compete with other paid educational services like MasterClass or Skillshare, they can also be provided for free.
The ability to have multiple audio tracks in different languages similar to what is possible with some streaming services and movies is one of the features that is being worked on.
There is a video here that you can use for yourself. It wouldn't be surprising if we see a built-in text-to-speech feature someday in the future, given that YouTube already has the ability to auto-translation and translate.
It is not known if the features will be available in other countries or if they will only be available in India.