If you have the codec but VLC is still struggling, you need to force VLC to use "Stream Copy" or specific hardware layers. Open VLC and go to . Click on the Input / Codecs tab. Look for Hardware-accelerated decoding .
If you want a "set it and forget it" solution that works for VLC and every other player on your system, the K-Lite Codec Pack is the gold standard. Download the . install hevc codec for vlc exclusive
If you’ve ever tried to play a 4K video or a modern MKV file only to be met with a stuttering mess or a "Codec not supported" error, you’ve hit the HEVC wall. High-Efficiency Video Coding (HEVC), also known as H.265, is the industry standard for high-quality, low-bandwidth video. If you have the codec but VLC is
Change it from "Automatic" to or "D3D11 Video Acceleration" . Look for Hardware-accelerated decoding
LAV is an incredibly powerful open-source decoder that handles HEVC/H.265 more efficiently than VLC’s native internal library in many cases.
HEVC decoding is heavily reliant on your Nvidia, AMD, or Intel drivers.