This is a test adding a video using the "Additional Features" menu. In the "advanced" posting mode, scroll down to the bottom of the post.
See "Additional Features"
Go to "Attach Files" It can take a MOV file on your PC. Mine is from an I phone. Files can be up to 500 meg
Click "manage attachments"
Click "Choose file" Then choose a file on your hard drive. When done, hit "upload"
If a slow upload speed, it may say "Uploading File(s), Please Wait"
Tried then got a fault message saying "Please upload video in the video field."
H'mm, something not working. Will have to ask Admin for help and report back