> Try downloading a video from a popular social network.
That's the site's decision. You also cannot easily download images from Twitter if there are more than one in a tweet for example. On Instagram it is blocked all in all.
No it isn't. UA means user agent, not corporate agent. If the user decides to persist something that is loaded on his machine then it is his choice to make.
No it isn't. UA means user agent, not corporate agent. If the user decides to persist something that is loaded on his machine then it is his choice to make.