This effect recreates the effect Johnny Harris (https://www.youtube.com/@johnnyharris) uses in his YT documentaries for still images. It moves a still image up a small amount with a blur at the beginning (7 frames long). I do not take credit for the artistic creativity, only for the port to kdenlive.

This can easily be adjusted for duration, blur amount and motion distance.

Edit: Better intructions for Windows users from @candideu:
Instead of downloading custom effects inside the app, download them from the KDE store, and save them to the AppData Roaming folder. You can quickly access this folder by opening the Run application and entering `%AppData%/kdenlive/effects`

In Windows, if you download effects directly from the Custom Effects window, it'll be mistakenly saved to `C:\Users\username\AppData\Local\kdenlive\effect-templates`.
However, custom effects should be saved to `C:\Users\username\AppData\Roaming\kdenlive\effects`, per the Kdenlive manual: https://userbase.kde.org/Kdenlive/Manual/Effects/Custom

I added a camera shutter FX from Pixabay (https://pixabay.com/?utm_source=link-attribution&utm_medium=referral&utm_campaign=music&utm_content=106269).