AWSのec2インスタンス内にてyum installでエラーが出る

下記のUdemyの講座通りにAWSのハンズオンを行っているのですが、表題の通りにec2インスタンス内にてyum installコマンドを打つとエラーが表示されます。
原因や解決方法を教えて頂きたいです。
これだけでOK！ AWS 認定ソリューションアーキテクト – アソシエイト試験突破講座（SAA-C02試験対応版）

エラー文は下記の通りです。
Could not retrieve mirrorlist https://amazonlinux-2-repos-ap-northeast-1.s3.ap-northeast-1.amazonaws.com/2/core/latest/x86_64/mirror.list error was
12: Timeout on https://amazonlinux-2-repos-ap-northeast-1.s3.ap-northeast-1.amazonaws.com/2/core/latest/x86_64/mirror.list: (28, 'Connection timed out after 5000 milliseconds')

One of the configured repositories failed (Unknown),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:

 1. Contact the upstream for the repository and get them to fix the problem.

 2. Reconfigure the baseurl/etc. for the repository, to point to a working
    upstream. This is most often useful if you are using a newer
    distribution release than is supported by the repository (and the
    packages for the previous distribution release still work).

 3. Run the command with the repository temporarily disabled
        yum --disablerepo=<repoid> ...

 4. Disable the repository permanently, so yum won't use it by default. Yum
    will then just ignore the repository until you permanently enable it
    again or use --enablerepo for temporary usage:

        yum-config-manager --disable <repoid>
    or
        subscription-manager repos --disable=<repoid>

 5. Configure the failing repository to be skipped, if it is unavailable.
    Note that yum will try to contact the repo. when it runs most commands,
    so will have to try and fail each time (and thus. yum will be be much
    slower). If it is a very temporary problem though, this is often a nice
    compromise:

        yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: amzn2-core/2/x86_64

yu_1985

2021/08/12 17:22

有料の動画の中身についてまで確認して、前提条件を考慮して解決策を出してくださいと言われても現実的ではありません。たとえ無料の動画でも、該当箇所をいちいち見るのは大変なので、何をどこまでやったのかを正確に順序通り記載するとスムーズです。今回でいうと、恐らくネットワーク周りの設定不足なのでちゃんと動画を見てその通りにやれば恐らくそのうち上手くいくでしょう。無理なら動画の方に質問をしたほうがよいかと。