HeroTalkies is a Netflix for Tamil, to put it as one-liner.

It's an affordable way to watch tamil movies whether you are living in India or abroad. It costs $7.99 per month for HD quality, I think it's worth it even if you watch only two movies per month.

I like that it's available thru multiple platforms. you can watch it thru chromecast, amazon firetv stick, roku, PC, mobile apps, etc., They also have recently released movies in the catalogue. These are not pirated movies. These are legally broadcast.

The site has free trial for one week. it's an option if you want to try it out. I am not affiliated with this site, but want to give a shout-out to herotalkies team for a job well done!