It's not based on old footage, but A VR experience for WWI was created. https://www.warremains.com/ https://www.warremains.com/ It uses CG, but in an intervie

It's not based on old footage, but A VR experience for WWI was created. https://www.warremains.com/ https://www.warremains.com/ It uses CG, but in an interview the head of production talked about how he kept trying to get his team to push the audio and visuals as much as possible since he really wanted to get the "viewer" to understand even a fraction of what it would have been like to be there. He wanted to make sure the viewer felt something instead of just being a fly on the wall like a lot of VR experiences.