The most immediate threat comes from the files themselves. Downloading executable files or archives from unverified sources is a primary vector for malware. There are explicit user reports of websites associated with this search redirecting to virus or adware-laden sites. These programs can range from annoying adware that bombards you with pop-ups to more dangerous forms like spyware (which monitors your activity) and ransomware (which holds your files hostage). The "better" file the user seeks could easily be a malicious file disguised as a high-quality video or image set.