aria2c by uri file.

download.py

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import re, os

name = 'Video Name'

num = 1
for line in file('uri', 'r'):
  p = re.compile(r'\..{1,5}\?')
  ex = p.search(line)
  os.system("aria2c -x5 -o %s%02d.%s '%s'"
            % ( name,
               num,
               ex.group()[1:-1],
               line)
           )
  num += 1

download.sh

#!/usr/bin/env bash

ext()
{
  ext=$(echo $@ | grep -oE '\..{1,5}\?')
  len=${#ext}
  echo ${ext:1:$len-2}
}

name_base='Video Name'
start_num=1

while read line
do
    # echo aria2c -x5 -o `printf "$name_base%02d.$(ext $line)" $start_num` "$line"
    aria2c -x5 -o `printf "$name_base%02d.$(ext $line)" $start_num` "$line"
    ((start_num++))
done < uri