The problem with VLC is just this one. "To view this porn video, download Fake_VLC_Media_PLayer.exe".
Or the totem plugin is launched (on a linux desktop) which is slow, crashy, doesn't work and makes the whole screen blank for an instant on loading.
There was a short window in time where I got WMV streaming working (instead of "windows media player failed to download the codec"). That was back when you downloaded codecs to watch video, and so there was that .exe file from Microsoft you could download to read WMV9 video files on Windows 98, which happened to enable streaming to work too. So there was video playing in the browser, which you could full screen and it plays perfectly smooth on a Celeron 500MHz!
4 years ago or so, I played a Silverlight video (never did again), which was some kind of Microsoft PR, don't ask me what or why. It lead me to a simple page for installing the linux version of the plug-in, which was very easily done. Then the video was smooth, flawless and with the then new feature of changing the stream depending on bandwith. But Silverlight did not catch on, because of Flash's 99% market share.
So, Microsoft solved web video twice! Though WMV wasn't a great solution (need compatible player, codec and plugin for the player)
Real Player worked too, before they did the redesign and went full on crapware.