[Edit 1730 GMT, 12/04/19] The video has since been taken down off YouTube. Scroll to the bottom to find links to other previews.
A new video preview of the Almuntassir brothers' Ultra Weather XP V2.5 has emerged in their closed Facebook group. To quote, it shows the "flying through clouds" effects expected in the upcoming update.
Ultra Weather XP also has a Facebook page, which you can check out here.