docs(devops): make video resources more obvious

subjects/devops/count-files/README.md

@@ -4,6 +4,10 @@
 
 Create a file `count-files.sh`, which will print the number **(and only the number)** of regular files and folders contained in the current directory and its sub-folders (the current directory must be included in the count).
 
+> Watch the videos:
+>
+> - [Wildcards](https://www.youtube.com/watch?v=DjBg8_ZtSDE)
+
 ### Usage
 
 ```console
@@ -45,6 +49,5 @@ $ wc -lwc example.md
 
 ### References
 
-- [Wildcards](https://www.youtube.com/watch?v=DjBg8_ZtSDE)
 - [Find](https://manned.org/find).
 - [wc](https://www.gnu.org/software/coreutils/wc).

subjects/devops/hello-devops/README.md

@@ -2,6 +2,11 @@
 
 ### Instructions
 
+> Watch the videos:
+>
+> - [Shell and Terminal](https://www.youtube.com/watch?v=6IFFfRF3ZFo)
+> - [Common shell commands](https://www.youtube.com/watch?v=WsqxJu8mBNE)
+
 #### 1- get-ready
 
 Create in your [Gitea](<https://((DOMAIN))/git>) account the repository named `((ROOT))`.
@@ -59,8 +64,3 @@ This action will run the tests on your submitted `hello-devops.sh` file.
 Videos designed to give **hints** are assigned. It is strongly suggested to watch them as you go.
 
 There are subtitles available in French and English.
-
-### Resources
-
-- [Shell and Terminal](https://www.youtube.com/watch?v=6IFFfRF3ZFo)
-- [Common shell commands](https://www.youtube.com/watch?v=WsqxJu8mBNE)

subjects/devops/json-researcher/README.md

@@ -17,6 +17,10 @@ $./json-researcher.sh | cat -e
 $
 ```
 
+> Watch the videos:
+>
+> - [Pipes](https://www.youtube.com/watch?v=ou9o20pzxeg)
+
 ### Hints
 
 With `curl` you can get the content of the file from the url:
@@ -59,7 +63,3 @@ You may need to use pipes `(|)` and the logical operator `&&`.
 
 > You have to use Man or Google to know more about commands flags, in order to solve this exercise!
 > Google and Man will be your friends!
-
-### References
-
-- [Pipes](https://www.youtube.com/watch?v=ou9o20pzxeg)

subjects/devops/strange-files/README.md

@@ -8,6 +8,10 @@ Create the following files:
 - `"medium_File!"` which contains `Random text inside!` and **nothing else**
 - `"\?$*'Hard_file'*$?\"` which contains `Random text inside!` and **nothing else**.
 
+> Watch the videos:
+>
+> - [Escape Characters](https://www.youtube.com/watch?v=ZenUrQeHl7c)
+
 ### Usage
 
 ```console
@@ -58,6 +62,5 @@ $ touch foo\!\\.txt
 
 ### References
 
-- [Escape Characters](https://www.youtube.com/watch?v=ZenUrQeHl7c)
 - [ls](https://www.gnu.org/software/coreutils/ls).
 - [touch](https://www.gnu.org/software/coreutils/touch).