Video Viewer for High-speed cameras
Form Viewer
Form Viewer is a video player that supports synchronized playback of multiple video files. It is especially designed for comparing and analyzing videos captured by high-speed cameras.
For Windows 10/11 64bit
The current version 1.5.X is available for free.

Features
Simple, lightweight, and multi-functional.
Save and Load Project
You can save the current working state of multiple videos and restore it later.
Many Video Formats
Supports not only AVI but also MP4, M4V, and other file formats
From Beginner to Expert
Intuitive interface. Shortcut keys provide frequently used functions.