DFRduino UNO R3 with IO Expansion Shield and USB Cable A-B

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I insert a link with a 64 MB video with all components available 6 days for downloading from WeTransfer website.

https://we.tl/t-dAzEnn2JuW

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But in order to install the code for DISPLAY I need to download the library first and I do not find it

I did not find the library : U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_DEV_0); // I2C / TWI…………..

I already installed the library u8g2

https://github.com/olikraus/u8g2/wiki/u8g2install

but I did not find the library mentioned : U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_DEV_0); // I2C / TWI…

please see the videoscreen in the next link and tell me what I do wrong : https://we.tl/t-Ohgm9lKu3N

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how can I read the CO2 value without having connected the display to DFRduino UNO R3 (- Compatible with Arduino Uno), using PC ?