Remove (not working) GIF of testing video from README

GItHub cannot display long GIFs due to long site loading because of the GIF files size.

README.md

@@ -84,8 +84,9 @@ catch (exception) {
 
 Check out [example application](example/README.md) with connections with both Arduino HC-05 and Raspberry Pi (RFCOMM) Bluetooth interfaces.
 
-[![Test with multiple connections](./example/docs/TestWithMultipleConnections.gif)](https://webm.red/qpGg.webm)
-
+Main screen and options |  Discovery and connecting  |  Simple chat with server  |  Background connection  |
+:---:|:---:|:---:|:---:|
+![](https://i.imgur.com/qeeMsVe.png)  |  ![](https://i.imgur.com/zruuelZ.png)  |  ![](https://i.imgur.com/y5mTUey.png)  |  ![](https://i.imgur.com/3wvwDVo.png)
 
 
 

example/README.md

@@ -25,9 +25,9 @@ Main screen and options |  Discovery and connecting  |  Simple chat with server
 
 #### Tests 
 
-There is a recording of the tests (click for higher quality, WEBM version):
+There is a recording of the tests (click for open video as WEBM version):
 
-[![Test with multiple connections](https://i.imgur.com/MfJZo70.gif)](https://webm.red/qpGg.webm)
+[![Test with multiple connections](https://i.imgur.com/rDFrYcS.png)](https://webm.red/qpGg.webm)