Devices
Handheld devices, such as a telephone, can stream audio and/or video content, in live or pre-recorded form, in varying quality depending on the hardware, as well as the internet connection in use.
Screen
Streaming
While a microphone can be introduced to a handheld device, as an enhancement to audio quality, video is limited largely by the graphics hardware in use and to a lesser extent, codecs in operation.
Recording
Using a device to record what is happening on a screen, as well as audio, is likely best accomplished using a tablet or notebook computer, since more than a single tab must be opened at once and switched between.
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