Update: If the content is pre-mapped (meaning, made in After Effects, Photoshop, MS Paint, etc.) and rendered out at the projector’s native resolution. The Pi Zero works great as a standalone seamless video looper by simply embedding this code into the rc.local file. (I stored a video file on a usb flash drive and entitled it “Video.mp4” You can also put your video file on the MicroSD that Raspbian is installed on.
omxplayer -b -o --no-osd --loop /mnt/usb/Video.mp4
Built off of the 1st gen. versions of the raspberry pi, the Pi Zero is a $5 computer that seems fit for simple projection mapping and playback. Thus far it’s limitations have simple fixes, but a lack of ethernet and additional usb ports is hoop that has to be jumped through. (My current setup is micro usb to 4-port usb 2.0 hub with nano wifi dongle & Logitech k400).