Adobe Premiere Pro Cs6 Portable — ~repack~
Go to File > Export > Media . Use the H.264 format for the best balance of quality and file size for platforms like YouTube. Official Alternatives
If you actually own a valid CS6 license (serial key), you can install the software directly onto an external SSD via a full Windows installation (Windows To Go). This is the only legal "portable" method. Adobe Premiere Pro Cs6 Portable
If you are looking for a video editor that is lightweight or more accessible, consider these official options: Go to File > Export > Media