Video link updates

Book_Links.md

@@ -14,7 +14,7 @@
 
 ###### Developer
 -  [https://www.unicode.org](https://www.unicode.org)-  [https://www.unicode.org/charts/PDF/U0000.pdf](https://www.unicode.org/charts/PDF/U0000.pdf) (ASCII)-  [http://devimages.apple.com/llvm/videos/LLVM\_Assembler\_Infrastructure.mov](http://devimages.apple.com/llvm/videos/LLVM\_Assembler\_Infrastructure.mov) (LLVM-MC Overview)
-###### Videos-  Video 1.1: Welcome ([https://youtu.be/HBwgXY88hyc](https://youtu.be/HBwgXY88hyc))-  Video 1.2: Signing Integers ([https://youtu.be/vHijiZMbj9E](https://youtu.be/vHijiZMbj9E))-  Video 1.3: A 3-bit Computer Example ([https://youtu.be/gYczcmDywag](https://youtu.be/gYczcmDywag))
+###### Videos-  [Video 1.1: Welcome](https://lowlevelcoder.com)-  [Video 1.2: Signing Integers](https://lowlevelcoder.com#video2)-  [Video 1.3: A 3-bit Computer Example](https://lowlevelcoder.com#video3)
 
 ###### In text
 - [https://en.wikipedia.org/wiki/ASCII](https://en.wikipedia.org/wiki/ASCII)

Materials/README.md

@@ -9,7 +9,7 @@ Here you will find additional materials and content we provide for the book. The
 - Console Input/Output
 	- [What if students or instructors want to be able to perform console Input/Output (I/O) before Chapter 6 and/or Chapter 10?](./Console\_IO/)
 	- [Console\_Output\_GAS\_Linux.s](./Console\_IO/Console\_Output\_GAS\_Linux.s), [Console\_Output\_GAS\_macOS.s](./Console\_IO/Console\_Output\_GAS\_macOS.s), [Console\_Output\_MASM.asm](./Console\_IO/Console\_Output\_MASM.asm), [Console\_Output\_NASM.asm](./Console\_IO/Console\_Output\_NASM.asm)
-	- [Materials Video 1](https://lowlevelcoder.com/materials-videos#video1)
+	- [Materials Video 1](https://lowlevelcoder.com/materials-videos)
 - GDB and LLDB
 	- [How do I use GDB or LLDB for command-line debugging?](./GDB\_LLDB/)
 	- [GDB\_LLDB\_GAS\_Linux.s](./GDB\_LLDB/GDB\_LLDB\_GAS\_Linux.s), [GDB\_LLDB\_GAS\_macOS.s](./GDB\_LLDB/GDB\_LLDB\_GAS\_macOS.s), [GDB\_LLDB\_NASM.asm](./GDB\_LLDB/GDB\_LLDB\_NASM.asm)