met[ads] Tunnel Viewer

Looks like a master file (ProRes, DNxHR or similar). Chrome can't decode those. Export a web proxy first (half resolution, same aspect, about a minute, 30 to 200 MB):

ffmpeg -i MASTER.mov -vf "scale=1408:1664:flags=lanczos" -c:v libx264 -preset veryfast -crf 18 -pix_fmt yuv420p -movflags +faststart -an tunnel_proxy.mp4

Or open this page in Safari on a Mac, which can usually play ProRes directly.

Content on the screen