libnvcuvid.so is missing
You should check if libnvcuvid is picked up by your host's ldconfig (ldconfig-p | grep cuvid).
With the following command, my container get libnvcuvid mounted from the host:
docker run -it --runtime nvidia -e NVIDIA_DRIVER_CAPABILITIES=video,compute,utility
验证方法：启动docker后，在docker环境中执行下面命令，如果能够找到libnvcuvid.so则说明环境配置正常了。
sh -c 'ldconfig -p | grep cuvid'参考：
https://github.com/NVIDIA/nvidia-docker/issues/1001
https://stackoverflow.com/questions/48786654/nvidia-driver-libraries-in-nvidia-cuda-image
https://github.com/NVIDIA/nvidia-docker/issues/531#issuecomment-343993909