One clear example of where this works is with YouTube videos. Downloading videos from YouTube is a popular request and there are lots of tools that can do it (many that charge), so you might be surprised to learn that you can download any video from YouTube with nothing more than a browser hack. You can also download entire YouTube playlists at once.
You can use DistillVideo to download youtube videos for free, download from youtube without software. You can download and save video, audio/music, captions to computer, iphone, iPad or andriod device (smartphone/tablet) very easily. DistillVideo is the best youtube video downloader using url online. Supports to download youtube videos MP4, WEBM, 3GP, AVI, MP3, M4A, 8K, 6K, 4K, 2K, 1080P, 720P, 480P, 360P, 240P, 144P, etc.
The Chrome Web Store—where you get Chrome browser extensions—is controlled by YouTube's owner Alphabet/Google. Even an extension ostensibly for this purpose—like the obviously named Video Downloader professional above—states right up front in its description, "The download of YouTube videos to hard drive is locked because of restrictions of the Chrome Store." In general with Chrome extensions, the download of any RTMP protocol video (protected videos) or streaming video isn't possible.
There are workarounds. One is using a free iOS file manager app like Documents by Readdle. Use the Safari browser to visit a YouTube video, and use the Share option to find Copy Link. Then go back to Documents, and use the built-in browser in the app to surf to a video download helper site like SaveFrom.net. Paste the link into the form (hold your finger down on it until you get "Paste" menu to pop up). The site will give you the links to download, and you can save the file to Documents. Hold down and drag the file up, until you're back on the main screen, then drag it to the Photos folder. You'll need to give Documents permission to access Photos the first time. You can then access the video like you would any video taken on the phone or tablet—in the Photos app.