I have created a free list with good Apache Kafka Developer Resources.

The list will be updated over time.

Documentation

Apache Kafka website
https://kafka.apache.org/

Confluent resources list
https://www.confluent.io/resources

Confluent online talks
https://www.confluent.io/online-talks

Podcast

Streaming Audio: A Confluent podcast about Apache Kafka
https://open.spotify.com/show/65WRDvSFQ2tkdk1GXlRPqR

Video Content

Confluent Youtube Channel
https://www.youtube.com/channel/UCmZz-Gj3caLLzEWBtbYUXaA

Viktor Gamov - Developer Advocate
Livestreams and talks about Apache Kafka.
https://www.youtube.com/user/gAmUssA85

Kai Wähner - Enterprise Architect
Great talks about Apache Kafka in different industries and streaming machine learning
https://www.youtube.com/user/megachucky

Robin Moffatt - Developer Advocate
Lots of good in-depth video content with Apache Kafka demos, Kafka Connect, ksqlDB, ElasticSearch & Kibana.
https://www.youtube.com/channel/UCWu69ik-sF104TILL8cl46Q

Sebastian Daschner - Developer Advocate
Great video content for developers about Java, enterprise software, distributed system, developer productivity.
https://www.youtube.com/channel/UCG21GE2Go3vkj7mrs675ysA