In my view, videos made of people playing whistles are basically worthless for judging the qualities of a tin whistle.
What do they signify? They are more an indication of the microphone being used, the acoustics of the place where the recording was made, the skill of the player and the loudness and treatment of the recording.
Not treating the recording (eg. compression, equalisation) is a treatment in itself. You are only hearing what a microphone recorded through whatever loudspeakers/headphones/earphones you are using.