With the first game on FloFC in the books, there were some notable problems with the stream. Personally, I had errors throughout the game, so hopefully they are worked out before the next game on the platform, which is against Real Salt Lake this coming Sunday.
One thing we do know now, however, is the general boundaries of the geofence within which you must use FloFC to watch a game live; outside of these boundries, you can use ESPN+ to watch D.C. United games live.
Most of the geofence follows state boundaries, county boundaries, or bodies of water that make interpreting the official (low-res) map fairly accurately.