While usually the embed iframe makes dozens of requests at once, often it doesn't, apparently caching wrong request data that stops the content from being reloaded.
It usually happens after one successful load of the iframe, in which it loads all packages within a couple of moments. Yet, if the page is reloaded, the iframe fails to load and does not resolve requests even if it was to throw an error. Instead, it only makes slow requests for Fragments with varying QualityLevels params.
A clear cache reload works, but only sometimes and it is impractical. Clearing all cache data solves the issue until it is reloaded again. There is only one error on the console from the Streams page, but it also appears when the video works perfectly.
