Video artifacts in all youtube videos (other platforms and gaming runs ok)

Hi there. From a time to now I'm having video artifacts (you know, random rectangles, lines, bad compression squares...) in almost every youtube video (on PC). At first I thought my vcard was dying, but heavy gaming, other platforms (FB, daylimotion...) and local videos (VLC mainly) play flawless. I have already tried to turn hardware acceleration OFF in chrome. In fact, it's even worse this way. I can't asure but I think it happens in all resolutions.
BTW, this happens in all browsers (chrome, firefox, Edge...)
My internet connection is ok, the video preload is ample.
My gear is:

intel i7 10700k on Asus ROG STRIX Z490-E GAMING. 32Gb RAM.

My vcard is a Gigabyte Geforce GTX 1070 G1 gaming 8GB DDR5

Any ideas?

Thanks and sorry for my english, it's not my language

 

Disable hardware acceleration in the browser options.

 

the decoder can be faulty without the gpu as a whole being faulty.

 

Thanks for the reply, Now I'm pretty sure that it's just a codec issue with certain youtube vids, so no fear. Local videos and games play fine.

I've been watching random videos from random channels and many of them are displayed correctly. No single artifact. SO That leads me to think that just by accident or coincidence, the videos/channels I use to watch have some codec issue with my system.

How can I check the codec that is running when you are playing a video on youtube?

Thanks

 

there is no such codec fault, your cards vp9 decoder is probably bad.

 

Ok, It seems it's a codec problem indeed. But faulty one is not vp9 but AV1. The issue appears in AV1 codec youtube videos. Vp9 ones are fine. If I download a vp9 and an AV1 video and play them on VLC, both of them show the pertinent codec, and both of them play fine. So the problem is with AV1 codec, but only on youtube, not local.
So, IF it's a youtube problem (not mine) Shouldn't there be more people with this problem?
Thanks

 

the 1070 doesn't even support AV1, have you got the Microsoft store AV1 decoder installed?

Did you change settings in chrome/edges advanced settings?

doe this play?

 

Yes, these videos play. The first one is too short to see artifacts, but the second one, yes, it has.
I didn't know that a gpu (moreover a relatively recent one) wasn't capable to support a particular codec.
And no, I have not installed that AV1 decoder. I thought that need for codec packs were a thing from the last century.... Nonetheless I'll try it. Thank you

 

Man, you are a genius! Thanks!
I've installed the AV1 decoder from microsoft and no single artifact in AV1 videos.
Thanks a lot!

 

Ampere and RDNA2 are the only architectures that support AV1 decode, anything older is seeing it done on CPU.

I can't replicate the artifacting in the second video on Chrome or Firefox

Ah, so its a flaw in the browsers fallback probably, i didn't think av1 is even supposed to play in the absence of the official extension.

It's not supposed to play

did you install AV1 Codec 1.1.41601 Free Download (free-codecs.com)

or similar?

 

As long as I know, nope, just the extension you have told me. ‍♀️