An attic is the worst place on the property for a live stream and one of the best places for a witness. The thing you find up there, daylight at a nail hole, a stain running down a rafter, a bath fan dumping into the insulation, is exactly what a homeowner in the kitchen below cannot picture from your description. So it is worth doing right, with the signal you actually have rather than the one you had on the roof.
Crawlspaces are the same problem lower down, with more dirt and less headroom. Everything here applies to both.
The signal at the hatch is not the signal at the far gable
Outside, signal is mostly about distance to the tower. Inside, it is about what is between you and it. One layer of deck and shingles costs you a little. A brick chimney, a foil-faced radiant barrier, a foundation wall or a slab costs you a lot, and the loss is not gradual. You can have three bars at the scuttle and nothing eight feet in, on the far side of the masonry.
So test in two places, not one. Check at the hatch before you commit, then check again once you are past whatever is going to block you, before you start narrating a finding. Thirty seconds of "can you still hear me" at the far end saves five minutes of describing rot to nobody.
Say where you are before you show anything
A viewer watching a roof has the sky and the ridge line to orient by. A viewer watching your attic has a screen full of pink insulation and a headlamp beam. They do not know which way you are facing, which side of the house you are on or how far in you have gone, and once they lose that they lose the ability to follow anything you say next.
So narrate position before condition, every time you move. "I'm at the hatch in the hall closet, facing the front of the house." "I've crawled about twelve feet toward the garage side, the chimney is on my left." It feels like overkill in the moment. On the recording it is the difference between a video of a stain and a video of a stain over the guest bathroom.
Inspection video on a weak signal is mostly narration
When the connection gets thin, the stream steps down. Sharper video becomes softer video before it becomes no video, and both you and the viewer get a warning when that happens. The thing that costs the least to carry is your voice. Words are small. Detail is not.
That changes how you should work. Put the words first and let the picture back them up. "There's a stain about the size of a dinner plate, dark in the middle, running down the north side of this rafter from the nail line" is a finding the viewer has even if the frame they got was soft. Hold the light steady, hold the phone still for a couple of seconds on each thing you name, and do not sweep. One slow, still shot on a weak link is worth ten fast ones.
Tell the viewer what they cannot see, too. "The camera is not going to pick this up in this light, but there's frost on the underside of the sheathing here." That sentence is on the recording. The frost may not be.
When it drops, back out, do not push in
If the stream drops in the attic, the instinct is to keep going and hope it catches up. It will not, and you will have crawled further from the signal while talking to no one. Stop. Back out toward the hatch until the warning clears, tell the viewer where you were and what you were mid-sentence on, then go back in. What to say in that first sentence back is covered in when the stream drops mid-walk, and it matters more here, because the viewer cannot tell a dropped stream from an inspector who simply went quiet in the dark.
Two safety points that outrank the stream. Do not move across joists with a phone in one hand; if you need both hands, put it down. And if you are choosing between watching your footing and watching the signal, watch your footing. No recording is worth a foot through the ceiling.
When to stop streaming and shoot a clip instead
Some attics have no usable signal past the hatch. You will know in the first minute. Do not spend the visit fighting it.
Instead, tell the viewer what is about to happen: "I'm going to lose you back there. I'll record a short clip on the phone camera, come back to the hatch, and walk you through it." Go in and shoot the clip the same way you would stream it, position first, then condition, slow and still. What to photograph in the attic is the list to shoot against. Come back to where the signal was, go live again, and describe what you found while it is fresh, with the homeowner able to ask questions. Then get the clip into the job file that afternoon, not left in the phone's camera roll, so it sits next to the recording instead of orbiting it.
The live recording has your position narration and the homeowner's questions. The clip has the detail. Together they are a better record than a stream that froze on a rafter.
What the homeowner actually gets
They get to be in the attic without being in the attic. Nobody wants to climb through a closet ceiling, and most homeowners have never seen the underside of their own roof. Hearing "this is directly above where you're sitting" while looking at it lands harder than any photo you could send afterward.
The viewer's side does not change because you went indoors: a texted link, opened in the browser they already have, no app, no account, and the whole thing recording on its own. The mechanics are on the how it works page. The honest way to find out what your attics do to it is to run one; every plan opens with a free week.
InspectStream records what an inspector observed. It is not a public adjusting service and does not prepare, negotiate, or advise on insurance claims.