You forgot to tell what browser are you using. For Internet Explorer, you deleted the so-called plug-ins for those file types. One can do this manual or by third party utilities. For example, click Tools, Internet Options, and Settings View Objects. Those are located in the registry under a precise path, so someone knowledgeable can delete them from there also.
Trying to unweave, unwind, unravel
And piece together the past and the future,
T. S. Eliot
Recently something has changed and I can't figure it out.
In the past, when I'm surfing and I click on a video type file, the appropriate player would automaticaly launch and play the video. Now, this does not happen.
The only way I can view the file is if I download and save the file. Then browse to it, click and then, the player will launch and play.