Second-Wind VS UKMM

Then you will want to go to this Github: Second Wind releases. Click Me.

Not only is BOTW playable, people have modded in new content and even a way to play multiplayer.

If you want to mod The Legend of Zelda Breath of the Wild with the fantastic mod Second Wind https://github.com/CEObrainz/Second-Wind

It's a mod named Second Wind, which you can find mod files for here. You can find a guide on how to use these mod files here. The mod is only for Wii U atm, but a Switch version is planned. You can find other Wii U BOTW mods here, and other Switch BOTW mods here. Mods are usually run in an emulator for the Wii U build, but they can be run on the console too. lmk if there's still something you're confused about, and I'll add it here for other people.

The BotW2 arm and tunic is a mod that banan039 released today. The wind effect on the arrows is a mod I made yesterday, using the particle effect from the (mostly) unused Gale Arrows. They get used during the Ganon fight, but are incredibly broken if the player uses them. So, I set regular arrows to use the wind gust effect. Also, the fortress is called Rozudo keep, and it's from Second Wind.

When I right click Breath of the Wild on CEMU and go to "Edit graphics pack" it seems there are some mods (like remove HUD elements, custom cel shading and glowing guardian color). Should I install mods using this CEMU feature, or should I use UKMM?

which format you can use depends on what mod manager you use. BCML only supports the RPX format, whereas UKMM (which is the successor to BCML, made by the same people) supports both RPX and WUA.