javascript error - 'Hello, you either have JavaScript turned off or an old version of Adobe's Flash Player...

i have tried every single solution suggested by youtube, adobe, and whoever else has suggestions, and nothing works. in fact the problem continues to worsen. now i can't watch any youtube whatsoever. i get the javascript error everytime. i need to watch many of these videos for my work, and i CAN'T! can anyone help solve this issue before i'm homeless or commit suicide?