Blur moving object - any simple approach

[Elusien]

See the tutorial in my post below for a possible solution:

Obscure Part of a Video Using the "Spot Remover" filter

I have created a short (3 minute) video on how to obscure part of a video using the “Spot Remover” filter . There are other ways to do this, e.g. using the “Mask: Simple Shape” filter followed by the “Mosaic” and “Mask: Apply” filters, but I find this one to be the simplest and is probably the easiest to use.