StarTech.com 2x2 HDMI Video Wall Controller, 4K 60Hz Input to 4x 1080p Output, 1 to 4 Port Multi-Screen Processor, RS-232/Ethernet Control - 2x2 HDMI video wall controller/processor to split and scale 4K
How To Make a Computer Fill the TV Screen When Connecting Through HDMI
How to Adjust Hdmi Screen Size on Tv Windows 10
Video-Scart-HDMI to HDMI Scaler Selector
HDMI Scaling Splitter with 1 Input and 4-Outputs CS-1X4HDMSPL5 - The Home Depot
SP12CS
Fixing Resolution of HDMI Output on PC
MD-HX HDMI / SDI Cross Converter
Resize an Image to Fit the Screen of HDMI Display | AMD
Output Menu – Support - Atomos
Amazon.com: 4K HDMI to Component Converter with Scaling Function, HDMI to YPbPr Converter Support 4K/60Hz HDMI 2.0 Input, Support 480i/576i Component Output, Compatible with DVD/PS3/PS4/PS5/Amazon Fire TV Sticks : Electronics
CYP HDMI 4k 2k scaler 4k2k 1080p up down scaling UHD Upscale Down scale Pro AV | eBay
GTB-HD-1080PS-BLK - High Definition 1080p Scaler Black