Creating Multimedia: Intermediate Level
Here are some examples of the applications and web sites that allow you to fairly easily create and manipulate media.
Hyperstudio is the chief tool for young multimedia makers in training studios for film houses. Student products with Hyperstudio have been incorporated into both entertainment and documentary films. Easy for the novice, it is designed for the "creative, the clumsy and the cool"(according to Roger Wagner's brochure).
"A major production. Without the major production." iMovie lets you create beautiful HD movies and Hollywood‑style trailers (some talent required). An inexpensive place to start if you have access to a Mac or iOS device.
Blabberize allows users to create talking pictures by selecting an image and recording their own voice-overs.
The best way to learn these tools is to dive in and create something. Your first few projects may not be of Oscar quality, but you'll learn more and get better each time.
If you're having problems, get the help of a mentor or check out tutorials on YouTube.
Modern smart phones can do a decent job of capturing video & sound. And new editing apps are coming out every month. Here are some examples. Most apps come with a simplified (non-Pro) version that lets you "try before you buy" - highly recomended.