How can I combine or merge multiple videos into one on Windows 11?

Avidemux is an open-source video editor that allows you to merge multiple videos into one using its lossless stream copying feature, preserving all original video and audio quality without the need for re-encoding.

Instructions: Open the software, click File → Open to select the first video file, set the video output to “Copy” to achieve lossless video streaming, and set the audio output to “Copy” to preserve the original audio track. click File → Append to load the second video, navigate to File → Save → Save Video, and name the output file “merged.mp4” to complete the merging process.

Its advantages include: open-source software with no watermarks; lossless merging that prevents video quality loss; low memory usage; and compatibility with many mainstream video formats via plugins.

Its disadvantages include: more steps required than other programs; an outdated interface; native support only for the AVI format, while MP4 requires an additional plugin; and the lack of a convenient drag-and-drop import feature.

This allows you to merge multiple separate video clips into a single, lossless MP4 file without any loss of video quality due to compression. The software is suitable for offline, one-time video merging on Windows computers, as well as for organizing your local video library when you need to combine multiple videos into one.