The employer contacted me! What are some interview tips you can give me?

Congratulations! That's awesome. 

We have a section of the website dedicated to helping applicants with those types of questions. If you'd like, you can check it out here:  www.hireart.com/resources. For this concern, I would specifically recommend you check out this article: Job Interview Tips.

A few additional pointers are:

1
Keep in mind that they have already seen your video and have some background information on you. Spend less time explaining who you are, and instead use this time to dig right in to your experience and why you are interested in the role.
2
Check LinkedIn to see if you have any acquaintances or friends of friends who work at the company. This could be a good way to learn more about the company ahead of the actual process.
3
Be yourself! If you get the job, it should be because they want someone like you. If they don't, then maybe it's better to not get the job and be unhappy later.

Good luck on your interview!