There are many videos available online that explain molecules and atoms in an engaging and informative way. Here are a few recommendations:

1. “Atoms and Molecules” by Crash Course Chemistry: This video provides a comprehensive overview of atoms and molecules, covering topics such as atomic structure, chemical bonding, and the properties of different elements. It is presented in an entertaining and easy-to-understand manner.

2. “The Molecule of Life: DNA” by TED-Ed: This animated video focuses specifically on the structure and importance of DNA molecules. It explains how DNA carries genetic information and plays a crucial role in the functioning of living organisms.

3. “The Periodic Table Song” by AsapSCIENCE: This catchy song introduces the periodic table of elements, highlighting the different atoms and their properties. It is a fun way to learn about the building blocks of matter.

4. “How Do Atoms Bond?” by It’s Okay To Be Smart: This video explores the concept of chemical bonding, explaining how atoms come together to form molecules. It covers different types of bonds, such as covalent and ionic bonds, and provides real-life examples to illustrate the concepts.

5. “The Inner Life of a Cell” by Harvard University: Although not a traditional video lecture, this animation showcases the molecular machinery inside a living cell. It provides a visually stunning and informative glimpse into the complex world of molecules and their interactions within cells.

These videos should give you a good starting point to learn about molecules and atoms. Remember to explore other resources as well to deepen your understanding of these fundamental concepts in chemistry and biology.