This is a common problem having to do with Youtube's embedded video standard that is not directly supported by IE without changing the configuration. Changing the configuration is much more difficult than installing either Chrome or Firefox.
Here are some links if you want to try the configuration fix, but I would suggest using an up to date browser.
https://itube.aimersoft.com/download...-explorer.html
https://community.articulate.com/dis...splaying-in-ie
