Some users request to get the blend mode dissolve.
While waiting, you may use a simple procedural texture filter to achieve the same effect with more flexibility.
Just add the filter from this document, and adjust the opacity parameter.
The filter layer must be nested to masking position of the parent layer.
Please note that I might have to delete the video at some time when I exceed my storage quota.
You can create the PT filter from scratch:
add formula
step(