Merge MP4 Videos: Combine MP4 Files for Free Online | Adobe Express
To join files without losing quality, LosslessCut or Avidemux can "append" files together quickly, provided they share the same encoding settings. g61091.mp4
DaVinci Resolve is a powerful, free option. You can drag all your clips into the timeline, right-click, and select "New Compound Clip" to merge them into one manageable unit. Merge MP4 Videos: Combine MP4 Files for Free