Welcome to Android Central forums. I did a quick search for this issue and found some other mentions of this.
Reddit 6mo ago
YouTube 1year ago
Samsung Community 6mo ago
Hi everyone, I’m using the Samsung Galaxy S24 (Snapdragon 8 Gen 3). Recently, I’m facing an issue while watching YouTube — videos play unevenly, sometimes going fast, slow, or pausing for a second (like glitching or “ruk ruk ke”). My network and app are fine, but the issue still continues. Has...
r2.community.samsung.com
My favorite part of the Samsung Members forums is where people paid by Samsung offer the worst most inaccurate advice. For instance in this thread, about the S24 ultra mind you, mentions taking the SD card out of the device and then details how to unmount it. Honestly, I just included it because it was the right phone and right problem. I wouldn't take any advice from the Members page if I didn't hear it in at least 2 other places. Sorry, I shouldn't start but it boils my blood that they do such a horrible job of helping their customers, their users. It's almost like they don't care after they have your money...
Life Wire 2mo ago
Did you come across any of these in your search to solve this?
When you say YouTube is black, do you mean just the thumbnail panels or do you mean the whole screen goes black and nothing shows, no words, banners, outline frames, etc?
Are you doing anything just before getting on YT, or are you doing anything while you're on YT?
Have you tried, not closing the YT app but closing everything on your Recent Apps/multi-tasking screen? I'm referring to the screen that shows all of your open apps.
Have you done anything with the virtual RAM offered on the S24U?
Given the symptoms you describe it sounds like you're RAM is at it's limits. Kind of surprising for the S24U, but this why I asked what you were doing before and during these sessions. Maybe you're playing a game with videos playing, or some other app you were just using is still using resources in the background? This is also why I asked about closing all of the apps that are open in the background. Free up some of that RAM. You may also be able to look at your Device Care App, it's in your settings. There you can see stuff about your battery but you can also see what is using your RAM and how much RAM is being used. To find this open Settings>Device Care>Memory. Before opening the Memory page you can see how much of your RAM is being used, then if you open the page you can see what is using your RAM and how much RAM it is using. Do you see any abnormally big users? Don't forget to use the View More option to see all of the apps, but the biggest users will be at the top. See if closing one or two of those using the most RAM helps. Or if you see something odd maybe try to disable that app and see if the issue persists. In the meantime, see if any of the advice in these other threads and pages where this has been reported have any helpful information or tips for you and then give us answers to my questions and we'll offer more advice.