That is very odd. Unfortunately I can’t seem to reproduce those kinds of errors.
Could you take a screenshot of the error you are receiving? I need to see if it’s the website itself or the vimeo embeds.
Also some hardware questions:
1. What operating system are you running?
2. What browser are you using?
3. Have you tried watching the tutorials in a different browser?
4. Do you have any custom or restrictive firewall settings currently enabled?
Thank you for your patience. We’ll try to get these tutorials working for you.