create a video for playing on a background on the website

I need a video like on [login to view URL] to put on a web-site. The main theme of the site will be devoted to children from orphanages and hospices. It will be a non-commercial platform where people will donate. I need a 30-seconds video with 2-4 seconds scenes of little children from newborn to 5 years old who do their daily activities. For example - a kid on a wheelchair doing something, little baby drinks milk, kids with severe illness playing a game, an adult is changing the diaper to a newborn. This video should motivate people to donate. This will be a first video to test the idea. The winner will be asked to make a 2-minutes video in 2-3 months later. Send me your proposals, ideas, and links to similar works.