Feature request: Overall improvement to the media player

[roydbt]

Some points I came up with:

• Make it load faster: Even if the media in question is already downloaded and viewed in the timeline, clicking on the media takes too long to view it in full screen
• Make your own UI: The default iOS media viewer isn't good enough. I don't need to view the name of the file and to saves it to files in 2 clicks, I want to be able to favorite a post straight from the media viewer