get_flash_videos: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/get_flash_videos - from package: get-flash-videos

You may install the required package with command apt-get install {package}

Error in other languages:
get_flash_videos: bevel nie gevind nie
get_flash_videos: comandă negăsită
get_flash_videos: comando não encontrado
get_flash_videos: commande introuvable
get_flash_videos: command not found
get_flash_videos: käsku ei ole
get_flash_videos: không tìm thấy lệnh
get_flash_videos: komanda nerasta
get_flash_videos: Kommando nicht gefunden.
get_flash_videos: kommandot finns inte
get_flash_videos: komut yok
get_flash_videos: nie znaleziono polecenia
get_flash_videos: níor aimsíodh an t-ordú
get_flash_videos: no se encontró la orden
get_flash_videos: no s'ha trobat l'ordre
get_flash_videos: opdracht niet gevonden
get_flash_videos: parancs nem található
get_flash_videos: perintah tidak ditemukan
get_flash_videos: príkaz nenájdený
get_flash_videos: příkaz nenalezen
get_flash_videos: команда не найдена
get_flash_videos: командата не е открита
get_flash_videos: 命令找不到
get_flash_videos: コマンドが見つかりません