Is it possible to have Add-On on Tor browser to directly download videos from the net? I have tried downloading a Firefox Add-On like VideoDownloader.net but it doesn't seem to work on Tor Browser? Help will be much appreciated and a link can also be of essence.
If you are using Tor in order to stay anonymous, installing new add-ons is highly discouraged as they can compromise your privacy and security and/or might break the functionality of the browser. As such, there is no official support for these types of configurations. See recommendations here and here:
Installing new add-ons may affect Tor Browser in unforeseen ways and potentially make your Tor Browser fingerprint unique. If your copy of Tor Browser has a unique fingerprint, your browsing activities can be deanonymized and tracked even though you are using Tor Browser.
Basically, each browser's settings and features create what is called a "browser fingerprint". Most browsers inadvertently create a unique fingerprint for each user which can be tracked across the internet. Tor Browser is specifically engineered to have a nearly identical (we're not perfect!) fingerprint across its users. This means each Tor Browser user looks like every other Tor Browser user, making it difficult to track any individual user.