YT SEO Optimize Image Alt Text

Edit - this app hasn't worked properly for a couple of months now. Often doesn't load at all and often doesn't find the new images that require alt text. Now the past week my anti-virus software is blocking access, saying it's on a URL Blacklist. I'm uninstalling unfortunately. Fantastic little free app that does what it says it will do. Very easy to set up and to apply every time I add new images. Saves me time in writing alt texts. Thank you!