How did we find out the truth?: We couldn't find any credible reports about several people from the USA converting into Hindu religion.
Next, we noticed the video frame by frame and found the flag of United Kingdom in the background.
We also noticed a religious chariot in the middle of the road.
Taking a cue, we performed a reverse image search along with some relevant keywords and found several old videos from 2022 of Rathayatra in London.
These videos were uploaded in September 2022.
We also compared the viral video with the YouTube videos and found similarities.
The video is from 2022.
(Source: Altered by The Quint)
We have also reached out to ISKCON London and got a confirmation from them that the video was indeed from London's Rathayatra celebrations.
Conclusion: An old video showing London Rathayatra is going viral to falsely claim that around seven lakh Americans converted into Hindu religion.
(Editor's Note: The copy has been updated to include Isckon London's statement.)