Added tooltip info for sliders in the VideoResourceViewer and MediaControls
MediaControls now only enables tooltips for its own elements

Extra buttons added need to have their own tooltips handling logic.
VideoResourceViewer now initializes the zoom controls tooltips
Videos now excludes the external quotes when returning the base64 icon
Merge pull request #76 from blackhydrogen/resource-video

MediaControls now handles its own tooltips, and returns the proper base64 icon