When users search for a "portable" version of a streaming site, they are usually looking for one of two things:
Because these "portable" apps are not verified by official stores, they are frequently used as "wrappers" for malware. Once you run the .exe file, it may install a keylogger or ransomware in the background.
A pre-configured web browser (like a portable version of Firefox or Brave) that has specific bookmarks, ad-blockers, and VPN settings designed to access these sites.
if you must run a "portable" app from a forum, run it inside a Windows Sandbox or a Virtual Machine (VM) so it cannot access your actual files. Final Verdict