I had at least some hopes for this effort until I saw the following:

Funded in part by the Corporation for Public Broadcasting through funds from the U.S. Department of Education.

Then this:

They meet famous historical figures such as George Washington, plus other figures that should be, like Phillis Wheatley - a published poet while still enslaved.

Ah, the obligatory politically correct crap. I fear this is just the work of statists trying to get out ahead of us to co-opt the "liberty" meme. If you can redefine it, you can own it.