Measure how far behind a live stream is
Compare one event marker against a known reference and record how the delay changes.

Pick a common event marker
Choose a visible or audible moment that appears in both broadcasts, such as a kickoff or a presenter cue. Compare the clocks when each feed shows it. Note the difference and confirm that both feeds cover the same event edition and regional broadcast.
Look at how the gap moves
A steady delay can reflect encoding, transport, buffering and playback strategy. A delay that grows after stalls can mean the player is falling behind the live edge. If the player has a live button, use it once and note whether the gap shrinks or the picture becomes less stable.
Choose a useful trade-off
For a match viewed alongside messages from friends, a delay measurement is more useful than a network speed result. For a long uninterrupted broadcast, stability may matter more than a small difference in delay. Keep the same player mode and time window when you compare options.
Sources
Questions readers ask
How can I measure the delay on live sports?
Use a common event marker, such as the same whistle or kickoff, across two authorized feeds. Record the elapsed gap and whether it grows after the player stalls.
Which clock should I record when two TVs show a live event at different times?
Record the wall clock and the match or programme clock on both TVs. Healthy streams can be at different points because of the delivery path. If one picture freezes, note whether both wall-time interruptions happened together.