My videos arent playing on my safari and it says "blocked plug in". I go to download an updated version of flash but it doesnt help, and It keeps saying it over and over. I also cannot log in to previous webpages. Cookies are enables and so are pop ups

Uninstall the old Flash plugin versions > Troubleshoot Flash Player | Mac OS

And turn OFF Extensions in Sarfari > Prerferences > Extensions. Quit and relaunch Safari to test.

And check to see if Safari is running in 32 bit mode. Right or control click the Safari icon in your Applications folder then click Get Info. If the box next to: Open in 32 bit mode is selected, deselect, quit then relaunch Safari.