yuvcorrect_tune: 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/yuvcorrect_tune - from package: mjpegtools

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

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