Uploading an audio clip to Youtube

Hey there!
So I am thinking about uploading a few music clips along with some stock footage to Youtube as some kind of Portfolio to attract some people to my Pond5 Page. I guess this will increase the chances that people who are actually willing to buy some music will come across this site.

My question is:
Would you guys suggest to upload watermarked Audio to Youtube, so nobody will just record the Audio and use it, or would you upload the original without any watermarks and simply put a link in the description, trusting that people wont just use the music without buying?

I am not quite sure which one seems like the better option. Or if it is an good idea at all to load up a selection of clips to Youtube.

Would love to hear your opinion on this.
Cheers!

Always watermark your work for YouTube or others, if you don't your work will be compromised immediately, when I used to do this I made sure my watermark was large on my clips with a big 'X' running through them. If the potential customer wants to see a more quality preview make you link the clip back to P5 where they can get in touch with them and meet their needs for inspection.