If the 'videolink' in question ends with '.html' then it can only be a URL (web address), not the video file itself. '.Html' is merely the filename extension for web page code.
It may be that the page referred to by the link contains an embedded video file that can be either be downloaded and played using one ot the applications I referred to in my earlier post; or played within the web page via an appropriate plug-in.
I'd be happy to take a look if you want to forward the link. Otherwise there's no way of determining which file type is being linked to and therefore which program/plug-in would be required to play it.
However, if you follow my advice in the previous post and install all the programs, chances are you'll be able to play it (oh and think of the whole evenings fun downloading you will have as a bonus)