Love the editing and music. Thanks for sharing.
Right now the video is just a bunch of talking heads - to make it really interesting you'll need a lot of b-roll that you can cut-in during the monologues.
You could also use one individual whose personal story will tie everything else together and give the audience something to follow.
The trailer is done well as a teaser but I wouldn't rely on it for marketing because the issue isn't presented well enough for people who don't know what it is about. E.g., it starts with the first talking head spewing terminology that most non-brahmins wouldn't understand. Also, there is a big difference between brahmins from south India and north India - though I'm aware that you are only targeting groups in Singapore, which I believe is predominantly south Indian. What's missing, in my opinion, is a flow - a proper beginning, middle and end.
I propose you base the structure of your trailer around the AIDA principle.
And don't forget good sound recording mixing!
Hope this helps.
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