Video is only playing sound, why?

Hey Webby057, can you please describe the steps you're following, so we can make sure we're not missing anything?

I have also had this issue in recent times. This is on an iMac desktop;.  If I download, they play fine, but cannot watch in dropbox. I use this a lot for work and it is very frustrating,  Things that have been there since before this started are fine but the issue is with new uploads.  It also applies to things I have uploaded myself, not just from other sources.

Hi Crispy59, could you try switching browsers to see if this helps?

Otherwise, you can try using incognito/private browsing mode without any extensions running, clearing your cache and even resetting your browser entirely.