This is an after effects template and requires the Adobe After Effects software.
If you don’t own a licence for After Effects , you can download the free trial from Adobe.
Even if you never used this software before , with the help of the video tutorial that comes with the template , you will be able to complete the job in no time at all.

If you want render the lower third and then use the resulting video in any other video editing software placing it on top of your main video , you’ll have to render RGB + Alpha Channel .
Here is a step by step video tutorial : How to render RGB + Alpha Channel in After Effects