Create a Channel in Microsoft Teams

Loriel try this video and instructions https://support.microsoft.com/en-us/office/get-your-team-up-and-running-702a2977-e662-4038-bef5-bdf8ee47b17b 

1. Open MS Teams
2. choose the TEAMS icon
3. Select the Join or create a team button
4. Use the ... next to Team Name to "Add channels"
5. Use the ... next to Team Name to "Add members"

To add in videos which are available on the internet, you can add a Website App. See how to add an app here https://support.microsoft.com/en-us/office/use-apps-6e22a734-c002-4da0-ba63-681f155b142d?wt.mc_id=otc_microsoft_teams

1. pick the WEBSITE app 
2. give it a title
3. Paste your URL in
4. Click save.