All it takes to turn that into a data presentation are a few extra slides focusing on your results. When creating slides, respect the nature of the medium. Give your audience a visual treat with colorful graphs, maps, and charts. Intersperse data slides with photos of the resource. Make the show dynamic - for instance, sequential shots of a map of your lake showing increasing milfoil coverage will demonstrate how the problem has spread out from boat launch areas.
Videos can really pack a wallop.
Incorporating sound and motion, they're the closest thing to being there. A good resource for video production is your community's public access cable TV station. You'll get equipment and training for free or a small fee. Ask for a list of people who produce local shows - they may be able to work with you to create a program, again for little or no expense. Once you complete a video, it can be shown again and again.