Fix or simplify video control

[geourjoa]

Some Mirador video control are not satisfying

• Video is playing, seek to other time. -> not working

  • Previously working with video element at this revision : 1cd7f4df2b99f753c75f4b10b0d7fc8f437403f3, check AnnotationOvelrayVideo/seekTo method
  • Problem come from the absence of onSeeked event in React Player
  • Problem is shared by all type of video (file, YT, PT)

• Seek before start a first time produce async viewing

• when seeking and on pause, show current frame

• Sometime the video time and mirador time was not sync, but it seems it was fixed now.

Not exhaustive list