Newsletter bitcoinops#30: add "optech recommends" for Max's readings

Author: harding

_posts/en/newsletters/2019-01-22-newsletter.md

@@ -38,6 +38,18 @@ changes to popular Bitcoin infrastructure projects.
     implementations will also provide the same feature in a compatible
     way.
 
+## Optech recommends
+
+If you prefer listening to audio rather than reading the weekly Optech
+newsletter, Max Hillebrand of World Crypto Network has recorded readings
+of every newsletter to date---providing a total of more than 6 hours of
+technical news about Bitcoin so far.  Audio and video is available on
+[YouTube][wcn optech playlist], and audio only is also available as a
+podcast via [iTunes][wcn itunes] and [acast][wcn acast].  Optech thanks
+Max for volunteering to perform the readings and for doing them so well.
+We encourage everyone who would prefer to receive the newsletter in
+video or audio form to follow Max for future readings.
+
 ## Notable code changes
 
 *Notable code changes this week in [Bitcoin Core][bitcoin core repo],
@@ -110,3 +122,6 @@ and [libsecp256k1][libsecp256k1 repo].*
 {% include references.md %}
 {% include linkers/issues.md issues="14941,14982,2448,2439,2198,2232,2234,2249,2215,2237,762" %}
 [spontaneous payments]: https://github.com/lightningnetwork/lnd/pull/2455
+[wcn optech playlist]: https://www.youtube.com/playlist?list=PLPj3KCksGbSY9pV6EI5zkHcut5UTCs1cp
+[wcn itunes]: https://itunes.apple.com/us/podcast/the-world-crypto-network-podcast/id825708806
+[wcn acast]: https://play.acast.com/s/world-crypto-network