Not only is that risky legally, but MEGA is aggressive about banning accounts and removing infringing files.
Type your keyword into the search bar. For example: "Blender tutorial assets" or "public domain horror movies" . mega nz search
Go to mega-search.me (or the current active domain—check Reddit for updates, as these sites move occasionally). Not only is that risky legally, but MEGA
Click the result. You will be redirected to a MEGA link preview page (like mega.nz/file/... ). On that page, you can see the folder/file contents without downloading immediately. Not only is that risky legally