You can’t move a file into a different folder on the internal hard drive using the standard firmware (you can’t open two panes in file manager to the internal drive).
You have some alternatives.
1 Recopy the original file to the correct folder from the original source using your holiday video folder as the destination. You can then delete the recording in the wrong place. If you haven’t got the original, copy it out to usb and back to the correct folder.
2 Install the Custom Firmware and use Windows Drive Mapping or FTP to move the file to the correct folder. Then either elect to remame the new file using file manager (you don’t need to change anything) or use the CF correct filepaths package (both correct the filepath stored in the .hmt sidecar file).