Hello Mauramom,
Thanks for reaching out through the Apple Support Communities about that difficulty with accessing those videos.
Are your iPhone and iPad all up-to-date? Update your iPhone, iPad, or iPod touch
Are you experiencing issues with any other websites?
Does that still continue if you clear your cookies using the steps in the following article? Clear the history and cookies from Safari on your iPhone, iPad, or iPod touch That article also has the steps to check for any content blockers that may be contributing to that behavior.
Additionally, have you had the opportunity to try accessing that content using a different web browser?
Hopefully those details will help to further isolate this behavior.
Take care.