Yes, most bagpipers should offer samples via YouTube videos or online music clips. For example, I refer all my customers to my father's website as well as additional YouTube videos in which I play the bagpipes to prove that I am a qualified bagpiper. I would be wary of any unknown bagpiper that does not refer you to a website, LinkedIn profile, YouTube channel, etc. Even bagpipers with YouTube clips may play the bagpipes poorly. To defend yourself against these wannabe bagpipers, check out this post in which I identify the easiest ways to distinguish a good bagpiper from the bad. I have many humorous/horror stories of awful bagpipers that still get hired, but those are stories for a later time.