Unable to seek/skip while streaming video

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http://crunchbang.org – I've been trying to solve a problem that I've been having, namely an extreme CPU load when playing certain flash videos, http://urplay.se/172488 in particular. It starts out at around 15% and slowly moves towards 100% load. I've tried disabling the "plugin-container" thingy in Iceweasel (the thing that ate all the CPU), but that did nothing. All that happened was that "firefox-bin" used the CPU instead.So I thought about streaming the video through SMPlayer, MPlayer or VLC, but it is not working as well as I had hoped. There are two videos that I've been (HowTos)