Personal data

Hi, Guys! Unfourtunatly Ive formated my SD card thinking I have saved the videos were there. I send the sd card to a professional. He managed to recover most pictures but about the videos it showed only some kbs (wich is not enough for a video). So it seemed that he found the data or any information related to this video but not real video. I nether can open it… It is like It doenst have anything in the file…

Please if someone could help me