Record you own Voiceover using clyp.it.
Open https://clyp.it in your browserClick Start Recording button. (Green Highlight)
After you are finished, Click the Stop button. (Green Highlight)
Click the Share Your Clyp button to get the URL link of your recording. (Green Highlight)
Be sure to give a Title and a Description to your Audio Recording.
Copy the URL link of your audio recording. (Red Highlight)
Going back to the editor, Paste the URL link of your audio recording inside the media box.
Press Enter or Click Get Media button inorder for the system to fetch your audio recording.That's it. You're done recording your own voiceover and adding it to your project.