I’ve been in your shoes before. I’ve been a one-man video operation for a large global corporation. What I always preferred to do is hire a freelance crew to use our equipment. Give them direction and let the set-up, light, and shoot the video. You are the Director. You work with the internal clients.
Corporate video is all about perception. If you’re perceived to be the camera person, you’ll never be promoted. If you’re the director, leading your crew, dealing with the client and even editing the video, the respect level of others will go up.
Sure shoot those small quick videos…but bring in good people to work with you on any time consuming projects. Once others start seeing the quality of what you’re delivering, you’ll get busier, and won’t have time to light, shoot, edit, etc. Good luck