START_IMG_URL : Image which comes on /start command in private messages of bot.PING_IMG_URL : Image which comes on /ping command of bot.PLAYLIST_IMG_URL : Image which comes on /play command of bot.GLOBAL_IMG_URL : Image which comes on /stats command of bot.STATS_IMG_URL : Image which comes on /stats command of bot.TELEGRAM_AUDIO_URL : This image comes when someone plays audios from telegram.TELEGRAM_VIDEO_URL : This image comes when someone plays videos from telegram.STREAM_IMG_URL : his image comes when someone plays m3u8 or index links.SOUNCLOUD_IMG_URL : This image comes when someone plays music from soundcloud.YOUTUBE_IMG_URL : This image comes if thumbnail generator fails to gen thumb anyhow.SPOTIFY_ARTIST_IMG_URL : This image comes when someone plays Spotify artist via link in inline mode.SPOTIFY_ALBUM_IMG_URL : This image comes when someone plays Spotify album via link in inline mode.SPOTIFY_PLAYLIST_IMG_URL : This image comes when someone plays Spotify album via link in inline mode.