Blur live filter layers mastering in Affinity Photo + shape

How to use the live filter layers 'blurs' in Affinity Photo with a shape (a variety of shapes are used). Examples of each of the blurs plus how to combine, use blend modes etc
https://youtu.be/0xhfqpuh9Ms
The subject is vast, you could do zillions of combinations to show all the features but this is a quick run through some of them