Claire Penny of Twinit outlines the onboarding process for developers at Twinit. This video introduces Twinit Academy, an online, self-paced training course designed to familiarize developers with the platform's capabilities. The sandbox environment is also mentioned, where developers can test their skills and ensure they have a solid understanding of Twinit. For further engagement, Claire directs viewers to the Twinit website for more information and contact details.