If you want to put your video files online using HTML5 then it's recommended to have three different formats for a full browser support. Those formats are mp4, ogv and webm.
Basic tutorial for everyone who want to will learn how to use a dedicated tool for really quick changing of any color you want on a photograph with the help of trusty Photoshop.
If you don't want others to use your photos and images without your permission, you can create a so called custom watermark with your name or any other text you want.
We will open a random photo taken at day light and add exploding fireworks to it. We will also we will modify the whole picture to make it as realistic as possible, enjoy!
This guide serves as an additional knowledge for Adobe Premiere. I will show you processing of vertical video clip which will be nicely visible also in horizontal view.