Youtube VP9 decode on Chrome - Nvidia laptop GPU

Hi. I have an Inspiron 5560 laptop with an Intel 11th Gen Tigerlake UHD graphics and an Nvidia Turing TU117x laptop GPU as highlighted by the inxi -G output below:

  Device-1: Intel TigerLake-H GT1 [UHD Graphics] driver: i915 v: kernel
  Device-2: NVIDIA TU117GLM [T1200 Laptop GPU] driver: nvidia v: 515.65.01
  Device-3: Microdia Integrated_Webcam_HD type: USB driver: uvcvideo
  Device-4: Logitech Logitech Webcam C925e type: USB
    driver: snd-usb-audio,uvcvideo
  Display: x11 server: X.Org v: 21.1.4 driver: X:
    loaded: modesetting,nvidia gpu: i915 resolution: 1: 3440x1440 2: N/A
  OpenGL: renderer: NVIDIA T1200 Laptop GPU/PCIe/SSE2 v: 4.6.0 NVIDIA

I’m trying to watch Youtube 4K60 videos using the dGPU and the Nvidia GPU I have, has the capability to do VP9 decode as highlighted by the a snippet of vdpau'info below:

Decoder capabilities:

name                        level macbs width height
VP9_PROFILE_0                   1 262144  8192  8192
VP9_PROFILE_1                  --- not supported ---
VP9_PROFILE_2                   1 262144  8192  8192
VP9_PROFILE_3                  --- not supported ---
HEVC_MAIN                      153 262144  8192  8192

But, when I play the 4K60 videos, I still get around 10% frame drops as per Youtube’s Stats for Nerds (Its not a network issue, as the Buffer Health is pretty solid). All my Chromium based browsers have the relevant GPU flags turned on/off, show in the browser://gpu settings that Video Decode: Hardware accelerated etc. While playing the 4K60 videos, even nvidia-smi shows the process on the GPU with GPU usage spiking to ~35%, but there are still frame drops. Can someone please help me in figuring out if I’m missing something? Any help is appreciated.