Cited as a reference
High Res Wifi Signal Mapping
Why people recommend it
A video of someone mapping wifi signal strength across a room, linked to show how much position affects reception; little else is known about it.
Watch for: Thin evidence; the channel is praised but not named
In their words
This video pretty much discribes what I am trying to say here: High Res Wifi Signal Mapping by user CNLohr on youtube
Joren Vaes on electronics.stackexchange.com, Mar 2018. CC BY-SA.