Open Wally's video editing software and add the video material at the end of the film to the software.

Add the video material in the media library to the track below the software.

Switch the page to the "Text" library, select a favorite text effect, add it to the text track below, and then set the display time and display duration of the text in the text track.

Enter the text editing page and edit the text you want, which is what you call a thank-you note.

After editing, you can return to the main page of the software to output video files.