QuickTime player is a multimedia software developed by Apple Inc. Yes, it's an Apple product, it's an all-in-one music and video player on Mac, but that doesn't necessarily mean it can play online videos like YouTube video or Vimeo video. To play online video with QuickTime, you have to use a "QuickTime downloader" to download videos for QuickTime Player.
There's many QuickTime downloader in the market, but not every one is good enough. Here I high recommend iTube HD Video Downloader, which not only allows you to download video form almost any video sites, but also convert video to be QuickTime compatible with high quality. Both SD or HD quality video can be downloaded in a few clicks.
This QuickTime download is not exclusive for Mac computers (including macOS High Sierra, Sierra, EL Capitan, Yosemite, Mavericks, Mountain Lion and the lowers); It's highly compatible with the standard Windows PC (Windows 10, 8, 7, XP and Vista). Both aides its users in downloading their favorite videos online with ease. Download the right version for your operating system. Here's a brief guide on how to do download your favorite movies and play with QuickTime Player.
First of all, download and install this QuickTime downloader. After this process, a "Download" button will be added to your browser (supports Chrome, Safari, and Firefox, to be selected while installing). This way, you can download video for QuickTime right from your browser.
Now go to the site to play the video you want to download. When the "Download" button appears at the top left corner of the video, click it to start downloading video to the original format, which is usually FLV or MP4. That means it's probably can't play with QuickTime Player. See the next steps.
This QuickTime downloader also supports downloading video by clicking the "Paste URL" after copying URL.
QuickTime downloader is not just a downloader, but a powerful FLV/MP4/WebM converter. You can use it to convert online or existing video file to QuickTime-compatible formats like MOV, M4V, or MP4. To convert the downloaded video, go to "Downloaded" tab, and click the "Add to Convert List" on the right of each video. Then go to "Convert" menu and find the video you import to this "Convert" list. Click the "Convert" icon next to the video. In the slide down window, choose MOV, for example. At last, click the Convert button and wait for the conversion to finish.
Watching your favorite movies through QuickTime Player can guarantee you a seamless and better experience. With the help of QuickTime downloader like iTube HD Video Downloader, you can now play all types of movie/videos with a great video experience.