Update README.md (skills#356)

removing broken video links

Author: cmwilson21

README.md

@@ -66,12 +66,10 @@ _Welcome to "Introduction to GitHub"! :wave:_
 <br>:tv: [Video: What is GitHub?](https://www.youtube.com/watch?v=pBy1zgt0XPc)
 
 **What is a repository?**: A _[repository](https://docs.github.com/get-started/quickstart/github-glossary#repository)_ is a project containing files and folders. A repository tracks versions of files and folders. For more information, see "[About repositories](https://docs.github.com/en/repositories/creating-and-managing-repositories/about-repositories)" from GitHub Docs.
-<br>:tv: [Video: Exploring a repository](https://www.youtube.com/watch?v=R8OAwrcMlRw)
 
 **What is a branch?**: A _[branch](https://docs.github.com/en/get-started/quickstart/github-glossary#branch)_ is a parallel version of your repository. By default, your repository has one branch named `main` and it is considered to be the definitive branch.  Creating additional branches allows you to copy the `main` branch of your repository and safely make any changes without disrupting the main project. Many people use branches to work on specific features without affecting any other parts of the project.
 
 Branches allow you to separate your work from the `main` branch. In other words, everyone's work is safe while you contribute. For more information, see "[About branches](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/about-branches)".
-<br>:tv: [Video: Branches](https://www.youtube.com/watch?v=xgQmu81G1yY)
 
 **What is a profile README?**: A _[profile README](https://docs.github.com/account-and-profile/setting-up-and-managing-your-github-profile/customizing-your-profile/managing-your-profile-readme)_ is essentially an "About me" section on your GitHub profile where you can share information about yourself with the community on GitHub.com. GitHub shows your profile README at the top of your profile page. For more information, see "[Managing your profile README](https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-github-profile/customizing-your-profile/managing-your-profile-readme)".
 
@@ -113,7 +111,7 @@ _You created a branch! :tada:_
 
 Creating a branch allows you to edit your project without changing the `main` branch. Now that you have a branch, it’s time to create a file and make your first commit!
 
-**What is a commit?**: A [commit](https://docs.github.com/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/about-commits) is a set of changes to the files and folders in your project. A commit exists in a branch. For more information, see "[About commits](https://docs.github.com/en/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/about-commits)".
+**What is a commit?**: A _[commit](https://docs.github.com/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/about-commits)_ is a set of changes to the files and folders in your project. A commit exists in a branch. For more information, see "[About commits](https://docs.github.com/en/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/about-commits)".
 
 ### :keyboard: Activity: Your first commit
 
@@ -159,7 +157,6 @@ _Nice work making that commit! :sparkles:_
 Now that you have made a change to the project and created a commit, it’s time to share your proposed change through a pull request!
 
 **What is a pull request?**: Collaboration happens on a _[pull request](https://docs.github.com/en/get-started/quickstart/github-glossary#pull-request)_. The pull request shows the changes in your branch to other people and allows people to accept, reject, or suggest additional changes to your branch. In a side by side comparison, this pull request is going to keep the changes you just made on your branch and propose applying them to the `main` project branch. For more information about pull requests, see "[About pull requests](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/about-pull-requests)" or watch the video linked below.
-<br>:tv: [Video: Introduction to pull requests](https://youtu.be/kJr-PIfLDl4)
 
 ### :keyboard: Activity: Create a pull request
 
@@ -201,7 +198,6 @@ _Nicely done! :sunglasses:_
 You successfully created a pull request. You can now merge your pull request.
 
 **What is a merge?**: A _[merge](https://docs.github.com/en/get-started/quickstart/github-glossary#merge)_ adds the changes in your pull request and branch into the `main` branch. For more information about merges, see "[Merging a pull request](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/incorporating-changes-from-a-pull-request/merging-a-pull-request)" or watch the video linked below.
-<br>:tv: [Video: Understanding the GitHub flow](https://www.youtube.com/watch?v=PBI2Rz-ZOxU)
 
 As noted in the previous step, you may have seen evidence of GitHub Actions running which automatically progresses your instructions to the next step. You'll have to wait for it to finish before you can merge your pull request. It will be ready when the merge pull request button is green.