Low. As a non-Unicode font, it won't display correctly on websites for users who don't have the font installed.
The safest way to download Mcl Vaidehi is through official government or educational platforms: Official Source: Tamil Virtual Academy Fonts Section Mcl Vaidehi Tamil Font Download LINK
You should legally purchase a modern Unicode font (e.g., Ramarajan, Mylai) to avoid future legal issues. Low. As a non-Unicode font
You can find the Mcl Vaidehi font for free across several font repositories and platforms: Mcl Vaidehi Tamil Font Download LINK