When people make vapor production videos, the lighting on the vapor is important, and also the camera view of it. Here is a short video clip I found where someone happens to demonstrate what I'm posting about:
YouTube - Provisional 4081 901 510
I don't know if it's just me, but when people blow the vapor on the camera, it can make it difficult to get a very accurate view of vapor production. In this video they further combined video segments, which is more difficult to do, but I just thought of at least suggesting a lateral view against a black background, with good lighting on the vapor the people are trying to review.
YouTube - Provisional 4081 901 510
I don't know if it's just me, but when people blow the vapor on the camera, it can make it difficult to get a very accurate view of vapor production. In this video they further combined video segments, which is more difficult to do, but I just thought of at least suggesting a lateral view against a black background, with good lighting on the vapor the people are trying to review.