youtubeUrl constant

Pattern const youtubeUrl

YouTube Video URL Regex Examples: https://youtu.be/dQw4w9WgXcQ, https://www.youtube.com/watch?v=dQw4w9WgXcQ

Implementation

static const Pattern youtubeUrl =
    r'^(https?\:\/\/)?(www\.youtube\.com|youtu\.?be)\/.+$';