IPA: //ˈvɪdiəʊkæˌsɛt//
KK: /ˈvɪdioʊkæˌsɛt/
A type of tape used to record and play video, usually stored in a plastic case and used with a VCR.
We watched an old movie on a videocassette last night.
Videocassette → It is formed from "video" (from Latin "videre", meaning to see) and "cassette" (from French "cassette", meaning a small box or case). The word "videocassette" refers to a small case that holds a tape for viewing video content.
Think of 'seeing' ('video') something stored in a 'small case' ('cassette') — that's why a videocassette is a small case that holds something you can see.
No commonly confused words.