UltraWide 21:9 vs UHD 4K | Which is for you? - YouTube
Lg Ultrawide 34bk95c-w 34" Uw-qhd Curved Screen Lcd Monitor - 21:9 - White - In-plane Switching (ips) Technology - 3440 X 1440 - 1.07 Billion Colors : Target
Almost all 21:9 videos on YouTube looks like this on ultrawide monitor : ultrawidemasterrace
Amazon.com: LG 34WN80C-B 34 inch 21:9 Curved UltraWide WQHD IPS Monitor with USB Type-C Connectivity sRGB 99 Percentage Color Gamut and HDR10 Compatibility, Black: Computers & Accessories
LG 34UC98: 34'' Class 21:9 UltraWide® WQHD IPS Thunderbolt™ Curved LED Monitor (34'' Diagonal) | LG USA
LG 38UC99-W 37.5" 21:9 WQHD+ Curved IPS FreeSync Monitor