To bolster customer onboarding with video, creating screencasts can be an effective way to show off a product and set new users up for success. The benefits include reduced customer queries, improved understanding of the product, and increased impact of product launches. Despite common misconceptions that creating screencasts is too hard or time-consuming, it's actually achievable with basic editing skills and a well-written script. Key tips for creating great-looking customer onboarding screencasts include having product knowledge first, writing a concise script, keeping the video short and focused, learning from experts, recording high-quality audio, and applying polish to the final touches. By following these steps and practicing, developers can create effective screencasts that enhance their product's onboarding process.