Fix video links (#111)

blog/safe-bitcoin-demo.mdx

@@ -19,13 +19,13 @@ I want to say a big "Thank You" to the people helping me out while creating this
 
 ## TL;DR
 
-If you don't like to read, you can just watch these videos below.
+If you don't like to read, you can just watch the video below.
 
-The first one explains the theory behind the demo and overall idea:
-<iframe width="560" height="315" src="https://www.youtube.com/embed/XtwHOsxOljc?si=XZyYd8WTHdZuKnUW" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+<iframe width="560" height="315" src="https://www.youtube.com/embed/ZC2dE9x-9sE?si=8S8oLxb6lqJo71gm" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
 
-The second one demonstrates how everything could be executed in practice:
-<iframe width="560" height="315" src="https://www.youtube.com/embed/Lj5SiNlxkGU?si=Ihf7m9CzvvVp8CMN" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+:::tip
+Jump to 3:35 if you want to see only the demo of how it works.
+:::
 
 ## What problem is being solved?