Anybody else having flaky behavior with youtube videos in Firefox lately? Like, only audio resuming but video freezing after rewinding? I'm wondering if this is intentional on the part of Google.
Given Google and YouTube's history of intentionally and maliciously disrupting other browsers that aren't chrome, it'll be a safe bet that it's intentional.
I think youtube makes itself terrible if you don't have premium. I have the problems you describe and others on both my desktop with FF or my chromebook with chrome.