From the My Videos screen find the video for which you want to change the text and tap the Gear icon.
Then tap the Edit button.
Tap Change Text.
Locate the shot that has the text needing to be changed, and tap on it.
Change the text in either of the two lines, and once you’re finished tap Done.
Once you’re done making changes to text, tap Back.
If you’re done making changes to this video, tap Save.
Then tap save again to give your video an updated title, then tap save to let it process and upload.