Hi @navidkhajouei, I had updated jetson-inference earlier this year (after that video was made) to automatically perform on-demand model downloading, so that downloader tool isn’t needed anymore and it’s normal not for it to show up now.
Thanks for letting me know about this - are you on JetPack 5.1.2 / L4T R35.4.1 by chance? (you can check this with cat /etc/nv_tegra_release)
When reproducing your issue, I found that if you ran the binaries installed under /usr/local/bin in the container, they load without issue (e.g. running video-viewer from any directory in the container as opposed to ./video-viewer from /jetson-inference/build/aarch64/bin)
I tracked it down due to a GStreamer incompatibility that was fixed by rebuilding the container specifically for L4T R35.4.1 - sorry about that. I’ve updated jetson-inference with commit 44c7661 - can you try doing a git pull and doing docker/run.sh again? It should then pull/run the updated dustynv/jetson-inference:r35.4.1 container image instead (not getting the error anymore)