What are Lipid Nanoparticles (LNP)?

What are LNPs (lipid nanoparticles)? What are they made of? What is the history of them?

In the first episode of Science Series 1, Dr. Rob Swanda walks through why LNPs are useful for the delivery of drugs (such as the mRNA Covid-19 vaccines), breaks down the ingredients of LNPs, and explains how LNPs were approved several years before the Pfizer/BioNTech & Moderna vaccines!

Source: https://youtu.be/v_0uqm5ANNs