It just works for me. I'm using Firefox. The arrow keys can go back and forth. I'm not sure it is exactly frame by frame but it is enough to get still photos from at specific points. You should also try YouTube Converter - ClipConverter.cc. This is a free plugin for Firefox to download YouTube videos. I use this to get YouTube videos onto my iPad. I use an app called TVTIPlayer to play the .mp4 videos from YouTube or from my camera. The app has frame by frame arrows. This makes it much easier to discuss techniques with my DD or my team.