You can download FFmpeg here: https://ffmpeg.org/download.html#build-windows
Installing FFmpeg on Windows 10
Windows 10/Ubuntu Dual Boot Time Fix
Intel NUC Build Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZNqgp0yXEWkhTdFm1ZkAt7h
View Time Settings
timedatectl
Set Clock to Localtime
timedatectl set-local-rtc 1 --adjust-system-clock
Windows 10/Ubuntu Dual Boot Default to Last OS
Intel NUC Build Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZNqgp0yXEWkhTdFm1ZkAt7h
Open Grub Config File
sudo nano /etc/default/grub
Add/Edit these Lines
GRUB_DEFAULT=saved GRUB_SAVEDEFAULT=true
Type control-o to save, control-x to exit.
Update Grub
sudo update-grub