According to the release note of the Video Security Client (page 3), you will notice that it is specified that the export of the mp4 video using the Video Security App on iOS or Android device is not possible, while for PC should work without issues.
This article contains the step-by-step guide related to the MP4 Video Export from Video Security Client to your PC (Windows) in a local directory.
In this article, the Video Security Client is connected to the Remote Portal and explains how you can export video from cameras connected to your RP account.
Video Security Client is the market’s easy to use video surveillance application provided by Bosch for local and remote monitoring of IP cameras and appliances. The software supports small systems from 1 to 128 sites with up to 256 cameras each. Also, you can use Video Security Client being connected to your Remote Portal account. Follow this article and find out the limitations and how can you connect your Remote Portal account to Video Security Client.
This article provides an answer to the question: Can I restrict the live view or playback in VSC for certain cameras added in DIVAR hybrid 5000?
Yes, you can restrict the live view or playback for certain cameras added in DIVAR hybrid 5000 for an user who is using Video Security App.