lolesports VODs view history?

I've been watching the world championship VODs on lolesports.com because sometimes watching it live is hard due to timezone or IRL duties, and I think you guys have done a great job with the website. I especially appreciate the efforts you put into to avoid spoilers, which was one of the biggest disadvantages of watching it straight from youtube. One feature I do miss is tracking viewing progress and viewing history. I assume that it'll be difficult to integrate the youtube player to track our viewing progress on each individual video, so I can live without that. But since we are already signed into lolesports.com, I wish lolesports.com tracks which videos I have watched already. e.g. if I have to stop watching in the middle of a best-of-5 series, I wish that when I come back the next day that the website keeps track of which games I have watched. That's all, thanks for your time and thanks for the website.