Nobody tells you the number, so everyone finds out mid-inspection: live video has a delay. A second or two, sometimes more on bad signal. Small enough to ignore in a spec sheet, big enough to make the first conversation feel strange.
Knowing it in advance is most of the fix.
Where the delay comes from
Video does not travel as video. Your phone captures frames, compresses them, packages them, and sends them across a cellular network to a server that hands them on to whoever is watching. Each of those steps costs time, and the network step costs the most and varies the most.
That is not a defect. Compression is what lets a roof walk go out over two bars of LTE at all, and a small buffer is what stops the picture falling apart every time the signal wobbles. Systems that drive delay toward zero do it by giving up resilience, which is a bad trade on a roof — the uplink is already the tightest constraint you are working with.
So the honest framing is not "how fast is it" but "what does a couple of seconds change." The answer is: the rhythm of talking, and nothing else.
What actually changes on the roof
Do not ask and immediately answer. The gap between your question and their reply is your delay plus their thinking time. Ask, then keep your mouth shut and look at the thing you asked about. Most people fill the silence at exactly the wrong moment and end up talking over the answer.
Move slower than feels natural. Panning at conversational speed produces a picture that is smeared for anyone with a soft connection. Move, stop, hold for a beat, let the frame settle. A held shot is worth more than a sweep for both the live viewer and the recording.
Point before you name. Get the thing in frame, then say what it is. Reversed, the viewer hears "this crack here" while still looking at a gutter three feet away.
Expect interruptions to land late. When somebody cuts in, they are reacting to something you said a moment ago. Pause and let them catch up rather than answering the question you assume they are asking.
None of this is hard. It is just different from a phone call, and the people who sound natural on a live walk are the ones who spent one inspection learning it rather than discovering it in front of a customer.
Say it in the first thirty seconds
The single highest-value habit: name the delay before it bites.
"There's a second or two of delay, so if we talk over each other, that's why — ask anything and I'll hear you." That sentence costs nothing and it converts every subsequent awkward overlap from a malfunction into an expected thing. Homeowners are entirely relaxed about a delay they were told to expect and quietly worried about one they were not. It belongs alongside everything else in the thirty seconds before you climb the ladder.
The recording has no delay problem
Worth remembering when the connection is having a bad day: the recording is not the stream.
The captured file is not degraded by the viewer's connection, and its usefulness does not depend on a conversation happening smoothly. So on a rough morning, the right instinct is to keep the walk clean and complete for the record and treat the live conversation as the part that may be lumpy — rather than the reverse, which is where people usually end up.
That is the practical version of doing both live and recorded. Live is where the trust gets built, and it is worth a couple of seconds of lag. The record is what you still have when the network was not cooperating.
If you want to see the actual delay on your own network rather than take a number on faith, that is what the free week is for — run one real inspection and watch it on a second phone. How it works covers the mechanics; every plan starts with 7 days, no card.
InspectStream records what an inspector observed. It is not a public adjusting service and does not prepare, negotiate, or advise on insurance claims.