I am a bit confused about what is slowing down my network and I hope it is correct to ask here and not at "webapps.sx.com", because my issue is not only one with YouTube, but basically many video sites.
I cannot understand how I, living in Seoul (South Korea), sporting a 100 Mbit LAN connection, have problems with content buffering and streaming? What I noticed is, when I use a advanced Download-Manager like jDownloader or DownThemAll or even a standard download manager, an e.g. YouTube video downloads pretty quickly – and I always download them in 720p.
But when I try to stream the same video – embedded on a site or directly on YT – it does buffer forever and loses all their progress (wtf??) when I go from the "small preview" to fullscreen mode! And all that is usually in 360 or 480p, not 720p! (I never watch in 720p because it is absolutely impossible.) Vimeo is a bit better, the only video site I noticed performs better. I had the same issue already back in Germany with a 30-33 Mbit LAN connection. This is especially confusing as the download speed for a YT video normally reaches 2-2,5 MB/second in "jDownloader" (otherwise I didn't measure), so that should be enough when it'd buffer with the same speed. Why is this not the case, is there a technical reason?
Why can't even Google / YouTube – seemingly – provide a fast enough buffering / streaming experience, what is the problem? Is it my PC / hardware? My laptop sports a Intel DualCore i7 (2010 generation) with 6 GB of RAM and always use the most recent Google Chrome browser and Adobe Flash Update.
Attached you find a most recent speedtest.net result: .
What is going on there?