I recently purchased a Lumix TZ 27 together with an PNY 8gb sdhc 20mbs card which is all fine but after taking some vidio with it and then trying to play it on my television which is also a panasonic Viera type set that accepts sd cards it informed me that it could not see the file but my other camara a panasonic standard sd card movie it will accept. I'm afraid im not to clued up with all the file type jargon i thought maybe a some kind soul out there in forum land might be able to help this poor technophobe Cheers n Beers for now 
