Login into your GASTON account. If you don't have an account, create Gaston account for free.
After you successfully log in into your account, locate "Add media" button in the top right corner.
Now, you have two options: Either upload your audio or video file directly from your computer, or add URL link to the website where is media located.
And that's it! Gaston will start transcribing your file and in few seconds shows you the transcription. You can play file, export it and even search in the generated transcript.