Mp4 player How can I play the mp4 videos from the Xacti HD2 on the computer. All standard players Quicktime, realplayer, windows player give me an error while loading the files! THX for some help.

MP4 is just the container. Your computer can't support the parameters in the MP4 file and thus you got the error code. You can try to convert MP4 to other formats or try other players. Here you can check this article, where you can find a player supporting 4K as well as other formats too.

Source: Can I Play 4K Video on Windows Media Player

There are many players to play mp4. You can try Leawo Free Blu-ray Player is an expert Blu-ray media player that could play Blu-ray/DVD discs, folders and ISO image files, videos (up to 4K), audio files on Windows and Mac. As a free MP4 player, it could play up to 4K MP4 videos without quality loss.

RealPlayer is another MP4 media player for users how love downloading and watching videos. The new RealPlayer is the best way to find all the hottest and most user-relevant video content on the web.

I have the HD2. I have to install code pack called CCCP to play my video on my pc. It's come with a Zoom player too. http://www.cccp-project.net/download.php?type=cccp