I have a related but different issue and have made a separate Canny for it, see if you're curious: https://feedback.vrchat.com/bug-reports/p/1290-nvidia-control-panel-vertical-sync-fast-can-cause-video-players-to-crash-th

This is also the case in my environment. After setting the vertical sync to high speed, when I try to play a video continuously with the AutoPlay function of "KineL式VideoPlayer", the second video does not play.

Windows 10 Pro 64bit

Intel Core i7-10700

32GB RAM

RTX2070SUPER

Here has additional information that in my case, I let my game use global settings and change global setting directly while testing, set Vsync to on doesn't cause issue for me but once I set Vsync option to "fast", it will 100% cause this issue and it's the only one that can cause issue for me ! (plus this video player error is also the major issue that cause two of vket main worlds get very terrible fps drop, fps boost from 15 to about 90 after do this workaround)

Monitor refresh rate is 144 and I use launch option to make my game run at 144fps also.

Win 10 21H1

Intel 8700K

RTX 3080 with driver version 471.68

Set to anything other than "fast" for VRChat at program settings is my final solution.

Hello.

I was suffering from similar symptoms, but after turning off Vertical Sync, I can now play videos.

Thank you very much.

The following is my PC environment.

OS:Windows10

CPU:RYZEN9 5900X

GPU:RTX 3070

RAM:32GB

給目前少數在VRCHAT UNITY2019更新後，遊戲中的YouTube撥放器、動畫撥放器無法使用的各位。

症狀：VRCHAT內開啟遊戲後第一個影片可以撥放，但之後的影片都無法撥放

解決方法：

・首先將電腦中的NVIDIA Control Panel開啟

・開啟之後點開3D設定中的「管理3D設定」

・點開後將「廣域設定」內的「垂直同步」選項改成「使用3D應用程式設定」

・在到廣域設定旁邊的「程式設定」內將VRCHAT的垂直同步關閉(如果沒看到VRCHAT選項請自行新增)

上述四點都用好後在到遊戲內測試看看動畫撥放器可不可以撥放吧！

祝大家可以用此方法解決你的問題。

此解決方法來自Tony_Lewis大師