Sorry for the confusion. The very important thing to consider here first is Aspect Ratio so what you're trying to achieve is not possible with any tool because this is a spatial limitation in design. Specifically, it's because of aspect ratio mismatch.
Your video has a squarish aspect ratio and if you make it fullscreen, it will be cropped because it does not match the aspect ratio of the screen or section real estate which is commonly a wide landscape rectangle. You will need to edit your video to match precisely the width and height of the section which I believe isn't feasible though because of this is the case, you will need to post a lot of videos with different aspect ratios to cover all the different screen sizes and aspect ratios.
You can see a quick explanation in this screencast: https://youtu.be/AMU0wvpx71c
If black bars are allowed to show like your bottom video, you can disable the Force Cover option of the video background in Slider Revolution. You then use Paul's suggestion and change the Slider Layout to Fullscreen so your slider spans fullwidth and height of the screen.
The login credentials didn't work by the way.