Update README.md

README.md

@@ -13,7 +13,7 @@ Overload indication is fixed. It works when the input power exceeds the board po
 
 ## How to rebuild a 100 Watt board to reliable work with QRP 1 - 5 Watt power, by ik3ssg (VIDEO)
 
-[![](https://www.youtube.com/watch?v=dPys_-_wPcQ/hqdefault.jpg)](https://www.youtube.com/watch?v=dPys_-_wPcQ)
+[![](https://img.youtube.com/vi/dPys_-_wPcQ/0.jpg)](https://www.youtube.com/watch?v=dPys_-_wPcQ)
 
 ### New in the version 3.0
 Added the ability to turn off the display backlight by timer and indication of the power delivered to the antenna and the transmitter efficiency.