The Format of the "Web/YouTube" as MP4
With the free version of Lightworks you only have a possibility of your project to export.
- Lightworks Free: your project can only be used as a YouTube Format can be exported. Since it is a MPEG-4 video track, the file as a MP4 Container. However, there are limitations. How to from YouTube to be known, are the Videos available in sizes 240p, 360p, 480p, 720p, and 1080p. In the free Version, only formats up to 720p are available.
- Lightworks Pro: All restrictions are lifted. You can export your project to any supported media file, including MP4. Also, the 1080p YouTube Format is enabled.

Lightworks Free vs. Lightworks Pro
If you want to spend money for the Software, there are with the Windows Movie Maker is a suitable Alternative. With a small detour, you save your project as an MP4. How this works in a further practical tip.