user-1: I need two displays hooked up to an Arduino MKR Wifi 1010, and I saw this video which shows how to do it: this video. I also would like to have a full color oled display about 1 inch big so I would like to use this display. But I don't believe that you can change the address and would not like to buy it until I find out if you can.
Thanks in advance.

user81959: There are two different OLED screens in the links you shared.
1. OLED Display on Adafruit Link
The OLED display on the Adafruit link does not have an address as it communicates via the SPI interface.
2. OLED Display on YouTube Link
This OLED display communicates via I2C interface. OLED displays that communicate over the I2C interface have a slave address. This provides the possibility to connect devices with different slave addresses on the same I2C line. The address of this screen can only take two different values. If you solder the 0 Ω resistor to the left field, its address will be 0x7A; if you solder the 0 Ω resistor to the right field, its address will be 0x78.

Suggestions
This OLED display with 0.96" screen size communicates via I2C interface and its address can be changed. If a 0 Ω resistor is connected to the A0 pad, the I2C slave address of the OLED display will be 0x3D; otherwise the I2C slave address of the OLED display will be 0x3C.


-1: <p>I need two displays hooked up to an Arduino MKR Wifi 1010, and I saw this video which shows how to do it: <a href="https://youtu.be/yef23sJjiU0" rel="nofollow noreferrer">this video</a>. I also would like to have a full color oled display about 1 inch big so I would like to use <a href="https://www.adafruit.com/product/684" rel="nofollow noreferrer">this display</a>. But I don't believe that you can change the address and would not like to buy it until I find out if you can.</p>
<p>Thanks in advance.</p>
 81959: <p>There are two different OLED screens in the links you shared.</p>
<h5>1. OLED Display on Adafruit Link</h5>
<p>The OLED display on the Adafruit link does not have an address as it communicates via the SPI interface.</p>
<h5>2. OLED Display on YouTube Link</h5>
<p>This OLED display communicates via I2C interface. OLED displays that communicate over the I2C interface have a slave address. This provides the possibility to connect devices with different slave addresses on the same I2C line. The address of this screen can only take two different values. If you solder the 0 Ω resistor to the left field, its address will be <code>0x7A</code>; if you solder the 0 Ω resistor to the right field, its address will be <code>0x78</code>.</p>
<hr>
<h5>Suggestions</h5>
<p><a href="https://www.adafruit.com/product/326" rel="nofollow noreferrer">This OLED display</a> with 0.96&quot; screen size communicates via I2C interface and its address can be changed. If a 0 Ω resistor is connected to the <strong>A0</strong> pad, the I2C slave address of the OLED display will be <code>0x3D</code>; otherwise the I2C slave address of the OLED display will be <code>0x3C</code>.</p>
<p><a href="https://i.stack.imgur.com/E5sA0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/E5sA0.png" alt="enter image description here" /></a></p>
