Download and play youtube videos in mplayer with a single command.

yt

#!/usr/bin/env bash
set -e

url="$1"
temp_dir=$(mktemp -d /tmp/yt.XXXXXXXXXXXXX)

validate_url() {
  if [ -z $url ]; then
    echo 'Usage: yt [url]'
    exit 0
  elif [[ ! $url =~ ^http(s)?://(www\.)?youtube\.com.*$ ]]; then
    echo 'Please use a working youtube URL'
    exit 0
  fi
}

validate_programs() {
  for i in $@; do
    if [ ! -n $(which -s "$i") ]; then
      echo "You need "$i" in your PATH to continue."
      exit 0
    fi
  done
}

fetch_video() {
  filename=$(youtube-dl -q --restrict-filenames --get-filename -o "${temp_dir}/%(id)s.%(ext)s" "$url")
  youtube-dl -q --restrict-filenames -o "$filename" "$url"
}

play_video() {
  mplayer -quiet -noborder -ontop -x 256 -y 144 "$filename"
}

main() {
  validate_url
  validate_programs youtube-dl mplayer
  fetch_video
  play_video
}

cleanup() {
  rm -rf "$temp_dir"
}

trap cleanup EXIT

main