uvccapture: 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/uvccapture - from package: uvccapture

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

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