Markdown Lab 4 (#549)

* updating instructions for retail

* updates to healthcare markdown

* retail lab 1

most of screen shots are finished besides PDFS and last task

* screenshots for lab 1 and intro video

* lab 4 screenshots

Author: uma-kumar

dev-ai-app-dev-retail/ai-exercise/ai-vector-search-challenge-answers.md

@@ -17,10 +17,6 @@ Unlike keyword search, AI Vector Search captures meaning. For example, 'Tampered
 Good luck, and enjoy the process. Let’s get coding!
 
 Estimated Time: 30 minutes
-
-To get things started we invite you to watch this video and see the lab in action:
-
-  [](videohub:1_iu6875ja:medium)
 
 ### Objective:
 

dev-ai-app-dev-retail/ai-exercise/ai-vector-search-challenge.md

@@ -18,10 +18,6 @@ Good luck, and enjoy the process. Let’s get coding!
 
 Estimated Time: 45 minutes
 
-To get things started we invite you to watch this video and see the lab in action:
-
-  [](videohub:1_iu6875ja:medium)
-
 ### Objective:
 
 In this lab, you will:

dev-ai-app-dev-retail/build/build.md

@@ -6,9 +6,6 @@ In this hands-on lab, you'll use Python to interact with Oracle Database 23ai -
 
 Estimated Time: 30 minutes
 
-To get things started we invite you to watch this video and see the lab in action:
-
-  [](videohub:1_v685fi7r:medium)
 
 ### Objectives