PS: Another hint, not related to config.txt. /storage/.kodi/userdata/advancedsettings.xml should look like this to avoid buffering:
<advancedsettings version="1.0">
<cache>
<memorysize>0</memorysize>
<buffermode>3</buffermode>
</cache>
</advancedsettings>So force turbo is a form of overclocking, but not going all the way with voltage changes, etc?
Yes.
So I don't lose my warranty?
Yes.
And I suppose if I don't want to force turbo 1 I can just add a # to that line in the config file and it will ignore my force turbo additional line?
Yes.
1. Where is the config.txt located?
2. You're just saying add force_turbo=1, nothing else? Am I overclocking? What would you recommend for the settings for RPI 4B 8 GB RAM?
Yes, that's all you need, and it fits for your device. It's no real overclocking, the RPi just stays at max regular clock level.
3. Where do I add this in the txt file?
Location doesn't matter, just make it the last line of config.txt.
4. Can this be undone?
Yes, just remove the line again. You will not lose your guarantee by using that option.
5. Should I re-rip first?
No, try overclocking first. If it doesn't work, remove overclocking and re-rip.
Create this /storage/.kodi/userdata/advancedsettings.xml:
<advancedsettings version="1.0">
<cache>
<buffermode>3</buffermode>
</cache>
</advancedsettings>I'm using the "Joyn" (and "DAZN") add-on from the KodiNerds repo without the need of VPN. Eventually you have to update to the latest LE nightly to make it work.
The Netflix links of your initial post are useless spam. I had to remove them. Maybe those links have been created by the forum formater.
The fix I used was to increase the minimum clock frequency for both the ARM and the GPU by adding entries in config.txt
What do you think of this?
It's worth to try. I would add force_turbo=1 to config.txt. The SoC's clock frequency will stay constantly at max then. So if it's a SoC frequency issue while playing video (speed down -> speed up...), this should fix it.
Re-ripping is also a good idea.
If you "Chinese TV" has a higher resolution than your Samsung TV, then the HDMI cable could be the weak part. For a 4K TV you need an HDMI 2.0 or 2.1 cable to transfer higher data rates.
Maybe because YT is running on a lower resolution. Set your default LE resolution lower (video settings). This reduces HDMI data rate, and maybe creates enough free data rate for audio.
OK, thanks for testing. The next trick sounds weird, but I know it solved audio issues for some users. When playing a video stream and pressing "OK", the status bar appears. On the bottom right you'll see a gear wheel, which contains a setting for de-interlacing. On my RPi nightly build this setting is grayed out, but you maybe have it. Deactivate de-interlacing, if you can.
Try with Bluetooth enabled.
Update to the latest stable LE version.
There are log levels available at advancedsettings.xml, but I don't think you will get more info by increasing the log level.
If you want to find out the reason of the issue, deactivate de-interlacing just for testing. Logging doesn't tells the whole story.
Try the latest LE nightly build, which has some improvements: Click! Put the img.gz file into the /storage/.update folder and reboot.
Grarea Stay sorted. Your initial sound question has been solved. I said you should open new threads now, but you don't. Before the thread becomes a total mishmash, I better close it.
Please try with disabled de-interlacing. You can find this setting inside the gear wheel menu while playing a video stream.
I had a discussion about censored words, too (Website and Forum Feedback). There is no way to reduce the blacklist of words. 
chook55 No mishmash of topics please. Open new threads for further questions.
Please open three new threads for those questions. We don't like the one-thread-for-everything idea (creates chaos).
Open a thread for Q2 on the current sub-forum (General Support), and for Q1 and Q3 here (PVR & DVB Support). Thanks!
Probably incomplete HDMI data coming from your Chinese TV. Create a custom EDID file.
Look on top of my link for details. Login by SSH and create advancedsettings.xml by using the nano editor, which is part of LE.