Length of clips

What is length of clips most of you post? It looks to be about 15 sec. I tend to go longer to give the buyer a choice of action or or visuals. Maybe that is the wrong way to go. Thoughts?

15 to 30 seconds at most. Longer and you’re giving away footage so cut it in pieces and upload those.

I’d say less than 10 seconds you’re not giving the buyer much to pick from.
That said most people only use a few seconds of your clip in their commercials