This file created in full HD 1920×1080. It’s 10 seconds long and includes alpha channel. Since the file is compressed with h.264 codec which doesn’t support alpha channel there are 2 files.
One file with the video with black background and one file which you can use as a Luma Matte to get alpha channel for the file.
When you’re ready you can overlay this on top of your video to simulate video malfunction, or broken signal etc.
If you have any questions or problems with this file please contact me.