How do I clearly distinguish between:
Using as few words as possible, without it sounding 'awkward' of course.
Black Hat Guy: "I was watching and listening to this moving image with audio data stream on my LCD screen and speakers respectively about..."
Mrs. Roberts: "You were what?"
Black Hat Guy: "I was watching a video on my computer about..."
For both technical and non-technical usage?
For both technical and non-technical usage, the clearest and most straightforward terms also happen to be the standard terms, such as in this guideline from the W3C (World Wide Web Consortium):
For example, in their Flash Media Developer Guide, Adobe refers to video-only streams, video and audio streams, and audio-only streams.
For most audiences, video or movie would be interpreted to mean something with both pictures and sound, unless you specify otherwise. The most familiar way of saying a video of some length only has moving pictures is that it's a silent movie. For a short item, we might call it a silent animation.
Technical documents such as this W3C guideline use words like audio-only and video-only but make sure to define them for readers. Here, the familiar term silent movie is an example of a video-only presentation. Video with no audio information is also used to make the meaning clear; in many contexts, even technical audiences may assume video can include audio unless its absence is mentioned.
