To skip the videos, do the following:
Right click on desktop and select “New” then “Shortcut” and enter this:
cmd.exe /C start shell:AppsFolder\Microsoft.FlightSimulator_8wekyb3d8bbwe!App “-FastLaunch”
Complete the shortcut wizard and you are good to go.
As far as the checking for update screen goes, we are stuck with that.
It is required, and there is nothing you can do.
All updates for MSFS are mandatory and they can’t be skipped.