Enhance Containerfile: Add gstreamer1 and ffmpegthumbnailer for improved multimedia support

Containerfile

@@ -12,10 +12,13 @@ RUN dnf install -y \
     @gnome-desktop \
     @hardware-support \
     @development-tools \
+    gstreamer1 \
     gstreamer1-plugins-base \
     gstreamer1-plugins-good \
     gstreamer1-plugins-bad-free \
+    gstreamer1-plugins-ugly-free \
     gstreamer1-libav \
+    gstreamer1-vaapi \
     ffmpeg \
     code \
     glibc-langpack-fr \
@@ -23,6 +26,7 @@ RUN dnf install -y \
     buildah \
     podman \
     podman-docker \
+    ffmpegthumbnailer \
     fuse-overlayfs \
     cups \
     dconf \