Youtube subtitle and download URL

youtube.go

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"regexp"
	"strings"
)

func main() {
	c := new(http.Client)
	//resp, err := c.Get("http://www.youtube.com/watch?v=OOUD2j-l7BI&feature=g-u-u&context=G2c38d77FUAAAAAAACAA")
	resp, err := c.Get("http://127.0.0.1/youtube.htm")

	if err != nil {
		fmt.Println("Error: ", err)
		return
	}
	defer resp.Body.Close()
	buf, err := ioutil.ReadAll(resp.Body)

	beginRegStr := `(?Usmi)yt.playerConfig.=.{.*"args":.{"ttsurl":."(.*)",.*"url_encoded_fmt_stream_map":."(.*)",.*}.*};`

	beginRegex, _ := regexp.Compile(beginRegStr)

	pos := beginRegex.FindAllSubmatch(buf, 1024)
	if pos == nil {
		fmt.Println("Nothing matched!")
		return
	}

	subtitle := make([]byte, 1024)
	urlsArray := make([]byte, 1024*20)

	for i := 0; i < len(pos); i++ {
		subtitle = pos[i][1]
		urlsArray = pos[i][2]
	}
	fmt.Println("subtitle: ", string(subtitle))

	urlStr := strings.Split(string(urlsArray), ",")
	for i := 0; i < len(urlStr); i++ {
		fmt.Println(i, ", ", urlStr[i])
	}
}