Custom Portals is a mod for Minecraft 1.16 that allows you to construct inter- and intradimensional portals out of any block.
Custom Portals is a Fabric mod. To use this mod, you will first need to install Fabric. You will also need the Fabric API. Note: This mod will NOT work with any version of Minecraft Forge.
Navigate to your .minecraft folder and place the .jar file you downloaded, along with the .jar for the Fabric API, into the "mods" folder. Launch Minecraft, and the mod should be installed.
To construct portals, you will need to craft portal catalysts. These are crafted with four ender pearls, four eyes of ender, and any dye, like so:
Once you have your portal catalysts, you'll want to build rectangular frames for your portals out of the block of your choice. The frames can be any size that a normal player can fit through.
When you're done, right click on the inside of the frame with your portal catalyst, and the portal will activate. Do the same where you want the other portal to be. If both of your portals are the same color and use the same block for their frames, they will automatically link to each other and you will be able to travel between them. Portals that are linked will emit particles. Remember that you can link portals across dimensions too!
You are free to use this mod in your modpack or video, so long as you link to either this page or the CurseForge page.