Seek does not work on mp4 video using multimedia macro (Chrome)

Seek does not work using the Multimedia macro.
I cannot skip around in the video, or rewind the video. It just keeps jumping back to the spot in time it left off at.

Other issues with multimedia macro:

• Autoplay does not work, on Chrome, it just always starts autoplaying
• 100% or 50% of the screen also do not work on chrome.
  The video is always too small when % are used. When using pixels, i can made the video bigger, but it will not adjust if another viewer is watching on a smaller screen size.