The important question is whether the connection can deliver your chosen stream reliably throughout the event. There is no single speed figure to apply to every camera, resolution and platform setup. Confirm the requirements for the exact workflow you plan to use.
Why should you check upload performance?
The venue sends the broadcast out to the platform, so its upload performance matters. Download speed alone does not describe that task. Compare tested upload capacity with the required streaming bitrate and leave suitable headroom according to the supported setup guidance.
What else shares the network?
Guests, staff systems and other productions may compete for the same connection. Ask the venue how the stream will be connected and managed. A test in an empty room does not necessarily reflect conditions once attendees arrive and begin using the network.
What does a useful rehearsal involve?
Run the intended stream for a representative session, with sound and the actual camera settings. Have another person check playback remotely. Record interruptions and quality changes. Where supported, a wired route may avoid some local wireless problems, but the full path still needs testing.
What should the backup plan cover?
Agree who monitors the connection and what viewers will be told if it fails. A backup route should be tested and compatible, rather than improvised on the night. Verify requirements with OowOah before advertising Live VR access, especially at a venue you have not streamed from before.