Ingest from URL
You can replace the video attachment by a URL form data, as in this example: The url should be "url-encoded"
curl -v --insecure \
-u ${USER}:${PASSWORD} "${HOST}/ingest/addTrack" \
--data-urlencode "url=${url}" \
--data-urlencode 'flavor=presenter/source' \
--data-urlencode "mediaPackage=${MP}" \
-o "${TMP_MP}"
The full script for the Ingest from external video URL