Export settings desktop and mobile

[Allen5E7D]

I have a 19 second video that needs to work on desktop and mobile, so file size is critical for load times.  The original file is 51MB.  If I use Match Source, Medium  Bitrate the file is 9MB, but exhibits a lot of artifacts when viewed on browsers.  The same for High Bit Rate 1080p (26.8MB).  The best was High Bit Rate 720p (26MB), but that is still too big.  All where output in H.264.

Our client provided us with a link to a website that has a 22 second video that is only 7MB and shows well.  So there must be an export setting that I don't know about.  Any help would be appreciated!

[Ann Bens · Accepted solution]

Its either image quality or filesize: cannot have both.

Export with what looks the best to you then convert with Handbrake to smaller size.

[Harold SIlva B. · Accepted solution]

Try to use handbrake to samller size 
Handbrake el transcodificador de vídeo multiproceso - Handbrake.es - Descargar Handbrake para PC y M...

[Allen5E7D]

That did the trick.  I found a tutorial on YouTube that explained how to tweak the settings, and I was able to reduce the file size significantly with an inperceptible change in quality on a 27 inch monitor and an iPhone 12 Pro Max.