TCP can recover missing data by retransmission, but recovery takes time. A stream may continue through small disruptions while its buffer lasts, then pause if delivery falls too far behind. Smooth playback does not mean the network never lost a packet.
Separate transport from presentation
The viewer sees a spinner or frozen picture, not the retransmission process itself. Similar symptoms can come from a source interruption or decoder problem. Do not assign a transport diagnosis solely from appearance.
Use practical comparisons
Try the same source over Ethernet and reduce competing traffic for one session. These steps can reveal local delivery problems without requiring packet capture. Record whether the interruption pattern changes rather than only measuring startup speed.
Leave advanced capture to appropriate support
Network captures can contain sensitive account and browsing data. If an administrator requests one, understand its scope and transfer it privately. A concise playback report is a safer starting point for ordinary troubleshooting.