While version 9.1.9 isn't the newest release, it supports nearly every format you will encounter:
Boilsoft Video Joiner 9.1.9 - ALLPCWorld is a handy tool for merging multiple video files into one. Its support for various video formats, batch processing, and customizable output make it a useful software for personal and professional use. Boilsoft Video Joiner 9.1.9 - ALLPCWorld