For MP4 (2.6GB)

    wget -qO- "https://hastebin.com/raw/amekevecum" | wget -nv --referer="https://www.feynmanlectures.caltech.edu/flptapes.html" --user-agent="Mozilla/5.0" --input-file -

For OGG:

    wget -qO- "https://hastebin.com/raw/esukabunew" | wget -nv --referer="https://www.feynmanlectures.caltech.edu/flptapes.html" --user-agent="Mozilla/5.0" --input-file -

Titles are here: https://www.feynmanlectures.caltech.edu/flpplaylist.js