Unless I am wrong, to import and edit the Samsung h.264 you'd need Studio 12.1 with the latest patch. My impression is that Studio 11 could not handle that format at all, athough you'd best check the Support and Patches sections. If that's not workable for you, the other option is to use the Samsung bundled software to create a DVD and import the VOB titles to Studio 11 to edit, or else (if that is possible) use the bundled software to export directly to a more common MPEG2 or AVI format.
Other threads discusss YouTube formats.