The plural of video is videos.
The correct plural of the noun "video" (a recorded presentation) is "videos."
It could be octopuses or octopi
You could give away money are You could try to get some one famous to come to your
videos
The plural of video is videos. For example: The shop stopped selling videos in favour of DVDs.
The plural of greatness is greatnesses. As in "their greatnesses are shown in the video".
Apostrophes are not used to form ordinary plural nouns. The plural of video is videos.The spelling video's would be a possessive describing the video, as in the video's length of the video's content.
singular = video plural = videos
"Video" is the singular form. The plural form for the word is "videos"
Unfortunately, for you, my friend, there is no plural for could. To make an existing word into a plural, it must be a noun (eg. dog, desk, planet). I, myself, don' exactly understand why such a question would be asked? If you don't mind me asking, why?
In the English language there is no plural for how and why. Their number is inferred by the way they are used. For example, if the question could have many answers or reasons, the inference would be plural, but if the question could only have one answer or one reason, the inference would be singular.