From the browser itself you can solve the problem.
Safari is one of the most popular browsers and the one preferred by Mac computer users. Despite having excellent performance, like everything else, it can have flaws in its platform.
Such is the case with its video reproductions, which usually present a certain problem that becomes quite annoying when we have to see any type of content on our Mac.
This is a problem in Safari Flash, that when it occurs, the playback tends to stutter, something that becomes annoying when it is frequent.
If this is happening to you, don’t despair. Fortunately, this problem has a solution and it is very simple. It will not be necessary to use another browser.
Here’s a quick solution for playing video in Safari:
How to fix video playback problem in Safari
For someone who frequently watches videos and works in editing, it can become a real headache, so this trick will help you take a great burden off your shoulders when you do it.
The first thing you should do is go to the Safari menu and select the Reset Safari option.
Then, you will have to verify that all the options are marked in the reset window.
Finally, click Restore.
And yes, it is a reset that will leave Safari as from the beginning, since all your cookies and other data associated with Safari will be deleted, but the important thing is that the problem is completely solved.