I am not a professional promotion video creator, but I have already created a few videos for my app. Here is a small promotion video for my app Battery Temperature Guard for android. And this is a video for the temperature widget of the same app.
Screencast your android app
The first step is to create some screencasts of your android app. This means you have to film what is happening on your screen. The best free tool to do this is SCR Screen Recorder Free. It is a great tool to simply create videos of your app. Check this article how to use SCR and gain root on your device. On the screenshot below you can see the SCR widget. By clicking the orange button, it will disappear and create a video of your screen.
|The SCR widget is ready|
Create your android promotion videoNow you have a bunch of videos you want to merge to a cool promotion video. I would recommend you to use the Microsoft Movie Maker. It is a simple tool to create/cut/annotate videos and images.
To use your screencast video inside the Movie Maker, you have to convert it using Free Video Converter. This tool is free. Add your video to the list and set the settings according to my screenshot below. Hit "convert" to convert the videos and wait a little bit.
|Loading the promotion video|
You will notice, that the video is rotated and not as you want it to be. To change the rotation of the current selected video, tap on the small icon I have marked on this screenshot.
|Fixing the rotated video is simple|
Customize your promotion video
Now you can start to edit your video. Add some text annotations, cut the video, slow some parts down, add some music and many many more. When you are done, you can export the video. I prefer full hd quality :)
|Exporting the Android Promotion Video|
Upload your android promotion video to youtube and add some cool music
Cool music will make your video appear cooler. Inside youtube you can add free music to your video. Click through some songs to find something smooth for your promotion video.
After you uploaded and modified the video, you can add it to your blog like this: