Hello Mishti,
Availing the credits: You can redeem these credits to book a trip from tripoto, 1 Credit = 4INR and that can change anytime, says tripoto. You cannot pay the entire cost of the trip from the credits, it varies from trip to trip and you may only know that when you're booking a trip. Validity is nowhere mentioned, the only official statement you'll find is that Tripoto reserves the right to take away the credits without any notice.
The credits can be eaen by posting the travelling photos by uploading trips and you should upload vedio also.. if there is not copy right issue than you should get credit like i get 32.. there is no time of redeems you can easily reedems anytime..❣️tq