Once you have chosen the right illustrations for your explainer video, you need to make sure they are well-designed and well-integrated. To do this, employ a clear and consistent visual language, using simple and recognizable symbols, icons, or metaphors. Additionally, create a dynamic and engaging visual storytelling with movement, animation, or transitions to create a sense of flow and progression. Furthermore, use contrast, hierarchy, or emphasis to create a focal point and hierarchy. Use characters, emotions, or situations to create a connection and empathy. Lastly, ensure your illustrations are pleasing and appealing with symmetry, alignment, or proportion to create a sense of order and balance. Use whitespace, negative space, or margins to create a sense of space and breathing room. Incorporate repetition, variation, or rhythm to create a sense of unity and diversity.