Is this normal fuel pump noise?

[Aarona4218]

Hi
Not sure if anyone will be able to tell from video but I can hear a hissing from my fuel tank is this normal?

Clio 200 fuel tank hissing??

youtube.com

 

[chris_blue]

Just replaced my fuel pump with a good used one, and its making a slight buzzing noise. Is it normal, air block, dirt block? Seems to run ok?

 

[chris_blue]

Been told its normal.