Look on the Panasonic web site for a manual to download. To remove the card, on the bottom of the camera is a slide opening, you will notice a gray arrow shape, push the slide in the direction of the arrow and it will slide to the right then you can swing it up, once you see the card you can gently push down on the card and it will pop up enough that you can pull the card out to replace. If you have a SD card slot on your computer you can place the SD card in your computer to view/download your pictures if you have software for photos.
Absolutely. It does. Finding a replacement battery, on the other hand, is a bit of a different matter. They are available, but they are expensive. And I'm not 100% sure if a replacement battery charger is or is not available. The replacment batteries are available on Amazon for around $55 or so. That's a bit steep, IMO. Replacement batteries for other Lumix models are about half that, or less. For example, Amazon has a couple of vendors offering 2 non-OEM batteries and a non-OEM universal wall/car/Euro charger for $29, with free shipping, for the Lumix ZS8.
There's simply nothing comparable for the FH25. Here's the link for the $55 replacement battery for the FH25 (at least it's a true OEM battery):
Dear. I put my camera under automatic shot and all is ok. When I put in scene mode to film some movies it works great, the image is HD, the collors are great, the quality is very very good, the sound is perfect, but monaural, it has one microphone inside, near the button shot. Maybe your camera needs some audio configurations. One disadvantage is when you select scene movies you don´t have access to the ZOOM feature, you have to adjust zoom first. Good Luck