Step 1: Upload your video from your computer to YouTube and choose privacy setting (private recommended).
Step 3: Click on Add new subtitles or CC and then choose the language you prefer. Next, choose the second option Transcribe and Auto-sync.
Step 4: Click Upload a File. You will want a .txt file. This process may take time, don't hesitate to hit the browser refresh button to check on the progress.
Step 5: When the process is finished you should be able to see two types of subtitles as shown below. We recommend you to delete the first one, “English (Automatic)”. If you would like to download your captions, you need to repeat step 2 and chose your published CC (not the automatic one).