Video uploads are handled using the video upload link in the attachment (paperclip) menu selection or right below the text box in the "REPLY".
They are limited to 500 megs, so they would need to be fairly short.
Longer videos need to be uploaded to a video sharing site like YouTube and then the link can be inserted like any other.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW