added video hint to each first exercise of piscine

subjects/fibonacci2/README.md

@@ -8,6 +8,10 @@ This functions receives a number `n` and returns the nth number in the fibonacci
 
 The Fibonacci Series starts like this: 0, 1, 1, 2, 3, 5, 8, 13 etc...
 
+### Recommendation
+
+Videos designed to give **hints** are assigned to each quest. It is strongly suggested to watch them as you go.
+
 ### Notions
 
 - [Primitives](https://doc.rust-lang.org/stable/rust-by-example/primitives.html)

subjects/hello-there/README.md

@@ -114,6 +114,10 @@ JS file that is a program that displays the exact text `Hello There !`, any `Num
 
 > Don't forget to commit and push the file to the servers
 
+### Recommendation
+
+Videos designed to give **hints** are assigned to each quest. It is strongly suggested to watch them as you go.
+
 ### You will learn about
 
 - Terminal

subjects/how-2-js/README.md

@@ -43,3 +43,7 @@ Great ! you are all set, if you want to re-execute your script, just refresh.
 You now just have to create a repository named `[[ROOT]]`,
 which will hold all your solutions for this piscine
 and just add your 2 generated files to it, we will start slow for now... 🐢
+
+### Recommendation
+
+Videos designed to give **hints** are assigned to each quest. It is strongly suggested to watch them as you go.

subjects/introduction/README.md

@@ -63,3 +63,7 @@ After that the `hello.sh` is executing correctly, it needs to be uploaded to the
 Once these steps are applied, the file can now be submitted for grading on the platform by clicking on the "RUN INTRODUCTION TEST..." button.
 
 This action will run the tests on your submitted `hello.sh` file.
+
+### Recommendation
+
+Videos designed to give **hints** are assigned to each quest. It is strongly suggested to watch them as you go.