curl -s 'https://news.ycombinator.com/from?site=youtube.com' \
| egrep -o 'https?://www.youtube.com[^"]+' \
| mpv --playlist=- \
  --speed=1.5 \
  --ytdl-format='bestvideo[height<=?720]+bestaudio/best'

This script (1) fetches recent YouTube submissions from HackerNews, (2) extracts youtube links from the page, and (3) plays them sequentially at 720p (1.5x).

Remember to upvote intellectually stimulating links on HN, write constructive comments, and support worthwhile creators via Patreon/merch/etc.