Hi JorgeSt,
Welcome to Sony's Community Site!
If you're referring to two or more separate video files, we recommend that you use the PlayMemories Home software to combine your recorded videos. For more information about this software, please check out this link: http://guide.playmemoriesonline.com/help/en/pc/pmh-video-edit.html
For further assistance regarding your concern, we kindly recommend visiting our Sony Global Web site for information on contacting the Sony Support Center in your region at http://www.sony.net/SonyInfo/Support/.
If my post answers your question, please click the button below "Accept as Solution".
Regards,
Dave