Add more video formats

[angelk]

We need more video formats to be added to the list.
Our list is in fileFinder.go

	movieExtensions := map[string]bool{
		".avi": true,
		".mkv": true,
		".mp4": true,
		".ts":  true,
	}

Video formats can be found here: https://en.wikipedia.org/wiki/Video_file_format