and if you can't use dropbox/google drive/onedrive/etc then you can always upload to youtube/vimeo/etc. the quality will be lower than the raw file, but more people will be able to view it. and in many cases, extreme detail/clarity might not be needed, for example, to prove you didn't cut anyone off and brake check them, or that your light was green, or that you never left your lane, etc...
personally i use 1 minute files. makes it easier to find things when i want to go back and see something we encountered on the road.