DIY Corner Fireplace Installation with Secret Hidden Storage Mantel

I really like the built. I want to built the exact same one. Can you make out with some more videos of that built?

This is the best corner tv, fireplace I have seen, as I'm trying to build it today the bottom, and top pieces has me stuck. I'm using a 2 by 8 inch, 46'L for my top, bottom and the angle cut has me frustrated, I've tried 22.5, 30, 45 angle cut and neither one is flush to the wall.Can you please tell me what angle cut did you use for your top, bottom.It's to cold to work in my garage, therefore, I've been working in the house. I would love to finish this frame asap.All of the other cuts are done. Thanks in Advance

Nice

Where are the measurements for the mantle pieces? I have the lower frame finished and am trting to start on the mantle.

Where did you purchase the fireplace from?

Beautiful work man🙌🏼