You can watch Hotstar promo code content for free for 48 hours, but still, you need to subscribe to their membership. I will encourage you to take Hotstar promo code subscription by applying 10% Promo so you will get discounted price. You can cancel Hotstar in 48 hours to not get charged in credit card. Hotstar is now available in the United States along with three other countries on the Online, Play Store, App Store, and Amazon Store.
Go to store all and download the Hotstar app. Just do 'sign in' (If you are a new member then do 'sign up' at us.hotstar.com/activate and then enter the promo)

If you have Hotstar India services and wanted to watch the same in the USA, then you need to buy a VPN. However, You need to check if VPN is legal in that country or not.
If you do not want to go in legalities, then You need to sign up Hotstar promo code because the pricing, policies, and terms of service differ in the US as per rights which Hotstar has got to publish contents. For example, India Hotstar barely costs you $19 yearly, but Hotstar promo code (United States) cost you $45 if you apply promo code: DESI50, and without promo code, you have to pay $50.
To me, using a VPN not make sense as you are paying VPN charges and also watching geo-restricted content within fear.
Why be in fear, go ahead us.hotstar.com/activate and click 'Sign up' link underneath the 'Sign in' button and Subscribe using promo: DESI50.

You have the option to use the Facebook account for Signup too. Just Enter the other required details and click the 'Sign Up' button on the bottom. Rest process is the same.

Now Put promo code, and you will see the discounted price. Go ahead and put credit card information and follow the onscreen instructions to sign up. Now Enjoy Hotstar US. You also get One Week free trial if you use Promo: DESI50.
Above is the complete process to watch Hotstar in the United States without using any VPN service. Now it does not fare if I will not tell you an unfair way to watch.

How to Watch Hotstar via VPN:

If you have Hotstar India account and you do not want Hotstar promo code subscription, then you can watch by using a VPN service. I will list out the popular VPN services below but I personally not used it so you can do further research on this if you are going with this method.
ExpressVPN: This is a popular VPN service, and when you use your device and connect the Indian server. The process is simple. First, turn this VPN service on and now in a computer, open www.hotstar.com and enter your Indian Hotstar credentials. Now, your India Hotstar is on and you may able to watch your favourite contents in FREE.
Note: There are many other Brands of VPN which you can choose.

Hotstar Famous web series:

As I said, Hostar is one of the leading platforms in India to watch web series, and there are many web series are launched and about to launch. Here are some of the best series on Hotstar.
1. Special OPS
Special OPs is one of the best Hindi web series in Hotstar. If you are buying Hotstar just for this, still you will get your money worth. This Hotstar Special Ops is directed and produced by Neeraj Pandey. This is mainly thriller story web series revolves around a counterfeit search for a terrorist mastermind which was behind the several blasts like Indian Parliament Attack in 2001, Mumbai Train Bombing in 2006, the '26/11' Mumbai Attacks in 2008, and Uri Attack in 2016 in Jammu and Kashmir. (Though the incidents are real, there wasn't a single leader behind them.) Special Ops uses that to call it "India's longest manhunt" which involves five agents and spans a dozen countries.
2. Criminal Justice

The intense drama series has Vikrant Massey, Pankaj Tripathi, and Jackie Shroff in pivotal roles.
The edge of the seat murder mystery is directed by Dhulia and Vishal Furia family.

3. Hundred

Hundred is the next original of Disney+ Hotstar in India. The action-comedy series has Kara Dutta and Rinku Rajguru in the lead. Hundred can be the series you watch this weekend.
So there are some of the best series I have watched on Hotstar. Soon I will be adding more series to this post. Thanks for reading.
4.The Office- Remake of famous British Sitcom of the same name.

5. Hostages Dr Mira and her family are held, hostages. To free her family, all she has to do is kill her patient.
6.Criminal justice
To be honest, these web series brought Hotstar on the next level, and if you compare with famous online movies portals like Netflix and Amazon Prime, Hotstar made his brand famous in a concise span.

Conclusion:

The reason is very simple Hotstar US is not only providing Movies, but it is perfect combinations of TV serials, Movies, Web series and Cricket. And the great thing is you can watch on two devices so if husband to watch the cricket, then wife can still watch her favourite serials. I see Hotstar is not only for Indian market but it is popular across Indian and Asian community and Hotstar has to think to expand this all the countries wherever indians are.