Yes, we need both email addresses along with the portal IDs to make this transition. Read more here: http://knowledge.hubspot.com/articles/kcs_article/resources/how-do-i-change-the-email-address-associated-with-my-hubspot-certifications.
You can either make up a company or use an existing one. Read more about this here: http://knowledge.hubspot.com/articles/kcs_article/resources/when-trying-to-sign-up-for-the-inbound-certificaiton-what-should-i-fill-in-for-website-url-and-company-name-if-i-dont-have-a-company
Most of the time, this happens due to a formatting error with the company URL you've provided. If you've added an extra "/" at the end of the URL, try removing it first. If that doesn't work, reference the following article for more help: http://knowledge.hubspot.com/articles/kcs_article/resources/why-am-i-getting-an-error-when-trying-to-sign-up-for-the-inbound-certification.
More often than not it's due to a temporary blip in the user's internet or a firewall access problem. We recommend trying to watch the videos with a different browser, internet access or device to see if it is not simply limited to your current set-up. If you're still experiencing problems, try the more in-depth troubleshooting methods mentioned in this article: http://knowledge.hubspot.com/articles/kcs_article/resources/what-should-i-do-if-hubspot-academy-videos-are-not-playing.
This is a great question. To see the answer in full detail, click the following link: http://knowledge.hubspot.com/articles/kcs_article/resources/why-am-i-being-notified-that-i-did-not-pass-a-certification-test-when-i-have-yet-to-take-it.