Another angle: sometimes people refer to viral links that have some hidden or unique features. Maybe the user is asking about a feature in a website or app that allows users to create shared playlists ("playlist" if "playcrot" was a typo) or some interactive elements. The mention of "interesting feature" suggests they want to understand what makes this content or feature stand out.
In some cases, viral content has a unique interactive element—like a filter on Instagram or a TikTok effect that users can try, which becomes popular. The "link" might be a shortened URL that leads to the specific filter, challenge, or website. The "interesting feature" could be the interactive part that people find engaging. The Viral Phenomenon of "Msbreewc" and the "Mandi