Apt install ffmpeg and yt-dlp

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

Dockerfile

@@ -10,6 +10,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         bash \
         ca-certificates \
         curl \
+        ffmpeg \
         gcc \
         gettext \
         git \
@@ -25,6 +26,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         wget \
         xz-utils \
         yq \
+        yt-dlp \
     && rm -rf /var/lib/apt/lists/*
 
 # ─── Python 3 ---────────────────────────────────────────────────
@@ -98,11 +100,6 @@ RUN curl -sLO https://github.com/kubernetes-sigs/kustomize/releases/download/kus
     chmod +x /usr/bin/kustomize && \
     rm kustomize_${KUSTOMIZE_VERSION}_linux_${ARCH}.tar.gz
 
-# ─── yt-dlp -────────────────────────────────────────────────────
-RUN curl -sLO https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp_linux && \
-    mv yt-dlp_linux /usr/bin/yt-dlp && \
-    chmod +x /usr/bin/yt-dlp
-
 # ─── Cleanup ────────────────────────────────────────────────────
 RUN rm -rf /var/lib/apt/lists/* \
     /tmp/* \