video (adj.)youdaoicibaDictYouDict[video 词源字典]
1935, as visual equivalent of audio, from Latin video "I see," first person singular present indicative of videre "to see" (see vision). As a noun, "that which is displayed on a (television) screen," 1937.
Engineers, however, remember the sad fate of television's first debut and are not willing to allow "video transmission" (as television is now called by moderns) to leave the laboratory until they are sure it will be accepted. ["The Michigan Technic," November 1937]
video game is from 1973.[video etymology, video origin, 英语词源]
cosplayyoudaoicibaDictYouDict
"The practice of dressing up as a character from a film, book, or video game, especially one from the Japanese genres of manga or anime", 1990s: blend of costume and play.