There are two types of videos that Startup Founders find most valuable for their startup
1 - Videos that clearly communicate the value prop of their product and to some extent their company, Videos that tell a clear story why customers need to buy their product, Videos that clearly articulate the customer success stories etc - These are videos that help with customer acquisition, revenue generation, scaling up etc.
2 - Videos that educate the founder and his employees. There are plenty of videos that educate the founder and his employees that can be found in youtube. One of the most valuable video that I found very useful is this movie called Startup . com.Here is a link to the movie in Youtube, every startup founder needs to watch this movie before starting their Startup.
So far I have started 3 companies, miserably failed in the first one, learned a lot, then again failed in the second one, again learned a lot and now on my third pursuit and making progress. I realized that I needed an education and a lot of guidance after failing twice and joined a MBA program with Georgia Tech, then learned the right way to get my startup off the ground by joining the incubator. We watched this movie in our class, it was a good one to learn from, don't make the mistakes these guys make, mostly Project Management mistakes while doing product development. Also I worked with a real entrepreneur that had dreams, vision and aspirations like myself and saw his struggles, helped him with some customer discovery exercises because I wanted to see how customers react so I can compare my results with his's. It was a great experience. It is all about solving problems for people, if you solve the problem the most people have, then you can sell your product to most people and make the most money. If you are working on getting your startup off the ground, I would highly recommend joining an incubator.
Also check out my book Puga Sankara's Supply Chain Blog - that is a must read before spending Hundreds & Thousands of $$$ on your MBA or Masters Degree to get the best ROI or before starting your Entrepreneurial journey.