If you would try my https://www.squarewebsites.org/squarespace-plugins/background-videos-utils and enable my simple iframes - it will respect the quality settings (you may set in backgrounds itself, use values accordingly, its ?quality=1080p for Vimeo, Youtube stopped support from query and uses adaptive stream now it seems, you were able to do ?vq=hd1080 before). SS realisation will ignore this, but plugin will try to use.
This is THE BEST SOLUTION to this freaking problem. Thank you. I just dropped the code in the cover page section and set the appropriate values and the background videos load straight to HD. Thank YOU! I was about to switch to WIX, saved a ton of work.
Force Background Video to Playback at Full Resolution? (Custom CSS)
in Customize with code
Posted
This is THE BEST SOLUTION to this freaking problem. Thank you. I just dropped the code in the cover page section and set the appropriate values and the background videos load straight to HD. Thank YOU! I was about to switch to WIX, saved a ton of work.