Hi, I am using windows 10 and getting this error
This is not related to LT Browser App but is a system(windows) related issue, the respective file must be missing in your local system and you need to download the same to your system, I am attaching a link Ffmpeg.dll Download - Fix Ffmpeg.dll Missing Error on Windows for quick help. Also attaching related link as reference ffmpeg.dll free download | DLL‑files.com
Please try the same and then download LT Browser. I hope this should work. Also please raise if you need any further assistance regarding this. We will be happy to help.