About the Google Maps APi, I have checked your code and you have to edit your main file index.html and change the line 187 with this current code:
to this one:
Replace the text YOUR_API_KEY by the code you have.
The video doesn’t play in mobile and tablet devices because the scripts uses doesn’t work in those devices correctl, so there are maybe some deveices where the video will not work. And about the video problems, I’m goint to check them and I will contact you with a solution.