A media file can contain more than one visual asset
A container may include attached cover art or thumbnails as well as its programme streams. A tool that lists something as a video stream can therefore be showing an image asset rather than the moving picture the viewer expects. Before declaring that an authorised file contains only one frame or has the wrong dimensions, inspect the stream identity and disposition.
FFprobe documents a distinction between the lower-case v video stream selector and upper-case V, which excludes attached pictures, thumbnails and cover art. This is a useful inspection detail, not a universal rule that the first listed video is always wrong. Review the actual file's stream list and the tool version rather than selecting by position alone.
A hypothetical archive inspection
Suppose a creator's authorised recording includes a square cover image and a widescreen programme. A quick script reads the first visual stream's dimensions and reports the entire file as square. The report is misleading because it measured the artwork. The next step is to identify the programme stream, not stretch the exported video until the summary looks widescreen.
Keep the original file and save a stream-information report with clear indices or identifiers. Note audio and subtitle streams too. A later remux or export should select the intended programme and required tracks deliberately. Copying every visual stream into a destination without checking its support can create another compatibility problem.
Separate artwork decisions from programme decisions
An archive or player may use attached artwork for browsing, while another application ignores it. A cover image appearing in the library does not prove the programme has decoded. Conversely, removing artwork should not be used as a substitute for investigating an unsupported programme codec. These are different objects with different purposes inside the media workflow.
If the delivery specification requests artwork separately, export or supply it through the documented authorised process. Do not replace a moving stream with a still image merely because both are described as video by a low-level tool. Preserve a human-readable record of what each selected stream represents, especially when a file contains multiple programmes or camera views.
Verify the selected output
After an intended export, play the moving content and inspect its actual dimensions, duration, audio and captions. Check whether the desired artwork remains available in the destination library if that is part of the task. A stream list alone cannot establish that the user-facing application chooses the right object for every screen.
The final inspection note should distinguish artwork dimensions from programme dimensions and identify the streams used. Avoid presenting the exercise as a device benchmark or a test of an unexamined IPTV account. The practical result is a correct description and selection of the authorised file's contents, preventing a thumbnail from silently determining a video-processing decision.
Questions answered
Does every listed video stream contain moving programme video?
No. A container can include attached pictures, cover art or thumbnails. Inspect the stream's role and disposition.
Does a cover image loading prove the recording plays?
No. Artwork display and programme decoding are separate checks.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.