These tests use background patterns on a screen instead of a printed moire. The idea is to be able to project the pattern on a screen or wall for larger scale schlieren videography.
On top the test setup with a stripe pattern on the external screen an a Logitech c930e camera.
In the first video a stripe pattern similar to the printed moire patterns is used:
This video is an attempt to get a better image by using a chequerboard pattern: