Honestly, I think it all depends on what you want to do. Phupha and Nanfah can act as a prequel, but there were details changed in the drama version that could also just make the drama constitute more as a remake of the two episodes. So, it could be either a prequel or remake depending on how you want to view it.
Personally, I don't think it really matters which one is viewed first, however, according to a lot of users, the Phupha and Nanfah episodes are more serious (as in not as comedic) and emotional than the drama so far. So, I think if you watch the "prequels" first then you can get a better sense of the emotions of some of the characters while you watch the drama. Though, because of the changes made to the drama, the feelings of the characters may not yet be at the same depth as they were at by the end of the "prequels." (If that makes sense? If not, when you watch them maybe you'll understand what I'm trying to say).
If you are worried watching the prequels first because they might contain spoilers of the drama, then I wouldn't worry about it. Phupha and Nanfah don't show much beyond Episode 1 of the drama, plus with the changes made to the drama, any details shown in the "prequels" not shown in the first episode of the drama, may not even be the same anymore.
The titles of the YouTube videos are confusing, but the link you posted is the correct one for part 1, Phupha. I'll post both of them below anyway just in case.
Phupha (Part/Episode 1): https://www.youtube.com/watch?v=PsGI1LJn-7Q
Nanfah (Part/Episode 2): https://www.youtube.com/watch?v=estp_6mHi1s
