This will be defaulted to 'English' however once you select this button, you can change the language under 'Language'.

On the right-hand side of your YouTube video, select the button under 'Active tracks'.Select 'Subtitles and CC' from this down arrow menu.In Video Manager, select the down arrow next to the 'Edit' button of the video you would like to caption.Once you have created an account, signed in and uploaded a video to YouTube, click on the down arrow next to the 'Upload' button at the top of the screen and select 'Video Manager'.It uses speech recognition software to generate captions from the videos you upload in over 12 different languages, yet due to the feature’s inaccuracy, it is essential to edit auto-captions after they have been created. The easiest way to caption a video that you have uploaded on YouTube is to use the auto-captions feature and then modify manually. Adding and editing auto-captions to videos Creating a YouTube account is free for all users and allows you to subscribe to channels, upload videos and share them with people on the web. If you have a Gmail account, you can also use this account to sign into YouTube. To upload and add captions to videos on YouTube, you must first create a YouTube account. Captions also help to increase the search ranking of a video so that it is more easily discovered through search engines. Providing captions on videos makes them accessible to a wider audience, including Deaf and hearing impaired users. YouTube is a popular way to share videos online.

How to add closed captions on youtube