download videos from wistia.com

dl-wistia.sh

#!/bin/bash

set -euo pipefail

[[ "$#" -lt 1 ]] && { echo "$0 http://someurl" && exit 1; }

which curl >/dev/null || { echo >&2 "Error: you need curl"; exit 2; }
which jq >/dev/null || { echo >&2 "Error: you need jq"; exit 2; }
which awk >/dev/null || { echo >&2 "Error: you need awk"; exit 2; }

declare pref_name=$(echo "${1}" | awk -F/ '{printf ("%s.mp4", $NF)}' )
declare iframe_url=$(curl -s "${1}" | grep -E 'https://fast.wistia.net/embed/iframe/[^?"]+' -o)

[[ -z "$iframe_url" ]] && {
    iframe_url='http://fast.wistia.net/embed/iframe/'
    iframe_url+=$(curl -s "${1}" | grep -E 'https://fast.wistia.com/embed/medias/[^/]+' -o | awk -F/ '{print $NF}')
}

declare -r md_mp4_video=$(curl -s ${iframe_url} | grep  "W.iframeInit([^)]*" -o | cut -c14-  | jq -r '.assets[] | select(.type == "md_mp4_video") | .url' 2>/dev/null )

echo "downloading ${pref_name} from: ${md_mp4_video}"
curl -o "${pref_name}" "${md_mp4_video}"

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