What you get on final delivery is Video with Full HD format (1920×1080), Mp3 of the voice over. and background music (if you need this).
Source files are the files you, the designer, have used to create your designs. The more well-known files include Adobe’s Animate, Adobe’s Illustrator, After effect and Premire. If you also need source file for future edit, printing, or other purpose you need to Pay extra $100