Is it safe to increase VRAM from either BIOS or registry editor?

[Microsoft Windows]

I've been thinking about upgrading my vram in my laptop and i found out that it is not possible to do so by the same way we do with physical rams. Then i found out about this increasing dedicated vram from BIOS or registry editor. I watched few videos about this and turns out it is really easy to do so, but I do know that it is not wise to mess around the BIOS as this will ruin the whole computer (Happened to me once, but that's a different story, lol). Therefore i need some opinions about this. Is it really okay to change the dedicated VRAM? What are the risks? will it affect my laptop's perf

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