video recording; video media
Refers to the physical or digital medium on which video is recorded, or video media in general. Often used in technical or archival contexts.
This video medium is suitable for long-term storage.
Digitization of video media is progressing.
記録媒体 is a broader term for any recording medium (audio, data, etc.), while 映像媒体 specifically refers to video.
ビデオ is a common loanword for video in general, often used for the content or the device, whereas 映像媒体 emphasizes the medium itself.
Compound of 映像 (image, video) and 媒体 (medium). The exact historical derivation is uncertain, but it follows standard Sino-Japanese word formation.