Its not ideal but I think its useful to see if you can hear relative differences between two components in the same video. It’s not going to give you an absolute impression of how each component sounds but rather a relative comparison between the two.
Someone above posted an example of taking a photo of two colors with a cellphone and then sending them to someone and asking them which one is better. I would say thats not the correct analogy. The proper analogy would be to take a picture with your cellphone of two different colors of white... lets take Benjamin Moore "White Dove" and then Benjamin Moore "Chantilly Lace" and then sending them to someone to ask which one they like better. Both of these colors are white. However, White dove has a tiny bit of black and yellow in it, and Chantilly Lace has a tiny bit of Black and Blue in it. Seeing them on their own they look like white... however in a cell phone picture side by side you can definitely see the difference. Now, can you tell from those pictures how each of those colors will look in a room, probably not. However if you know you want a "cool" white rather than a "warm" white and you want to know the relative difference between the two then the cellphone picture can do that.
