You have choices
There are other PDF readers - even for windows. Try doing a web search. AFAIK only Adobe are dumb enough to support javascript. Gootube videos can be downloaded with youtube-dl and watched if you have gnash and mplayer (I do not know if these work on Windows). If there is a useful website that requires flash then I would not know as the first thing I do with a browser is to disable flash, javascript and java.


