Downloaded video quality depends on the original upload, platform processing, the media variant exposed to the downloader and the way your device displays the file.
Resolution
Resolution describes the pixel dimensions of a frame. Higher dimensions can preserve more detail, but only if the source contains that detail. Upscaling a low-quality source to larger dimensions does not recreate information that was lost.
Bitrate
Bitrate is the amount of data used over time. Two files with the same resolution can look different because one allocates more data to motion, texture and fine detail. Very low bitrate can produce blockiness, smearing and banding.
Compression and codecs
Platforms compress uploads to reduce bandwidth and storage. A codec determines how video information is represented, while compression settings determine how aggressively detail is removed. Efficient codecs can achieve good quality at a lower bitrate than older approaches.
Frame rate
Frame rate affects motion smoothness. A video recorded at a high frame rate may be processed or delivered differently by a platform. Resolution and frame rate together influence the amount of data needed for a clean result.
Why a downloaded copy can differ from the creator’s original
The file available through a public platform is typically an encoded delivery version, not the untouched camera original. A downloader can only return a variant that the upstream platform or media source makes available to it.
What CyberVid means by “HD when available”
CyberVid asks its configured processing path for the higher-quality public video variant where supported. If only a lower-quality public source is available, the tool cannot invent missing detail. Quality can also vary between videos and over time as providers change.