Update README.md

Author: HotNoob

README.md

@@ -112,7 +112,7 @@ more docs on setting up mqtt here: https://www.home-assistant.io/integrations/mq
 i probably might have missed something. ha is new to me.
 
 #### connect mqtt on home assistant with external mqtt broker
-[![HowTo Connect External MQTT Broker To HomeAssistant](https://img.youtube.com/vi/sP2gYLYQat8/0.jpg)](https://www.youtube.com/watch?v=sP2gYLYQat8)
+[HowTo Connect External MQTT Broker To HomeAssistant](https://www.youtube.com/watch?v=sP2gYLYQat8)
 
 ### general update procedure
 update files and restart script / service