If you take the card out of the camera and transfer the videos to a computer, you will see you have a folder for each day, inside of which is a folder for each hour, inside of which are 1-minute long videos for each minute. VLC Media Player, Windows Media Player or macOS Quicktime will let you play back an hour’s worth in sequence without having to concatenate the files. This includes the ability to fast forward.
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Here’s one example of short microUSB cables that are known to fit the camera power-i slot:
https://smile.amazon.com/gp/product/B01B4SHM52/ref=oh_aui_search_asin_title?ie=UTF8&psc=1