Video walls and synced video to multiple monitors or projectors is a common task for video and multimedia art-installations . More powerful computers and single board computers like the Raspberry-Pi make this process much easier but it is still complex.
Video Wall Options
There are commercial solutions available but these are often expensive. With a little bit of experimentation for a specific setup, a much more affordable solution can be created.
Bright Sign Video Players
Bright Sign Connected Chrome App
Connect player to the internet with ethernet Connect player to display with HDMI Insert blank XX-Fat 32 Micro-SD card into the player - Best to use a high quality card capable of many write cycles. Player needs to have OS version 8.0 or higher to work Download software update from Bright Sign These small media players can sync and are less expensive than bigger systems. This is basically an out of the box plug and play solution
Isadora Software can make a video wall and keep videos in sync - Has a monthly subscription of about $30 so not expensive for a temporary installation. Can be run on a single computer. They have guides on their site.
Raspberry Pis with Commercial Streaming Services
For a bit more DIY but still commercial product, use Raspberry Pi’s set up as video players and synced with the service Screenplay
Info Beamer is another Raspberry Pi Streaming service, about $10 a month per screen.
VLC on a Single Computer with Multiple Monitors
You can also use VLC player on a laptop or computer with both projectors connected to it. It has a feature to split into a video wall but may not have perfect frame sync.