The only way to really know if the You-tuber likes his new free toy, is to see how many times he is seen using it after a couple months.

As others have said, it is common practice. Watch any movie....if you can read 'Cheerios' on the cereal box, 'Pepsi' or 'Bud' on the drink, or 'Dell' on the computer, it is all paid for from some companies advertising budget. Otherwise, it would not be readable.

Can you imagine any famous actor doing a PSA for FREE, announcing how much he likes Preparation H?