Re: How to add video to a forum post
You need a host. You can't upload straight from your PC.
OneDrive is a solution, but make a separate folder. If you share a link to a file, everything in that folder can be seen.
If you want to embed the video, you need a video host like YouTube. Personally, I use Dailymotion as there are no Google Bots sniffing the files and traffic there.
Make the video, make sure it is mp4 format and upload to your host. Then drop a link or embed.