How do i tranfer video clip from HDD to the sd card

Does the tablet recognize the SD card?

Please can you shout this in English, or a reasonable facsimile thereof ? Thank you.

First, make sure you have it on CARD (and not DISK), and on the "playback" (and not record) mode. Next, does the camera play back other video clips normally, but just not a specific clip ?
Does the selected video clip frame (index) shown on the LCD screen have a picture ? If not, i.e. it is blank (dark), then it is likely that no video was recorded (i.e. just the audio) when you were shooting that video clip.
If there is a picture (of the video clip frame index on the LCD screen) and only audio is playing, try downloading the clip (from the SD card) to your computer, or simply try to play the video on the SD card (inserted directly into your SD card reader on your computer, or via a USB SD card reader) and see if the video clip will play normally on your computer.

All you need is a laptop that has an sd card slot and transfer your photos or videos to the sd card and stick it in your laptop and go to your doc called ''my compurter''and there you go you got your stuff and im only a girl that is 10 years old

Is it the SD memory card? or the Micro HDD(4GB) you're pertaining to. In case of micro hdd not detected or error, micro hdd socket(CF) assembly has a problem most likely, need to be replaced. SD card; check your SD card's capacity, it can handle only up to 2GB or try to format your card elsewhere and re insert it again in your camcorder, if it will prompt you "FORMAT SD CARD?" you're lucky

When you changed sd cards did you make sure it was the same spec as the one you had, their are differant sd cards, if you are upgrading to a bigger card, make sure you have the same card but just a bigger version of it, the sd card you have now may not be the right one.

Try Downloading Quicktime to your PC. Its free and it plays 3GP(Mobile Phone) and MP4. Which is probably the format your phone is saving the videos in.

http://www.apple.com/quicktime/download/

Download Link is on the Left.

you can try some data recovery software. You can see
recover files from sd card
It tells the steps how to perform data recovery.

If above does not work, you may have to format the memory card (use quick format), and then use sd card recovery software to scan again the memory card and recover your files.