How did we find out the truth?: We divided the video into multiple keyframes using InVid, a video verification tool and came across a YouTube video from 10 January.
This video was 42 minutes long where Roshan interacted with his fan online.
In the interview, the interviewer asks Roshan if he has a message for his fans.
Roshan's reply to this question has been digitally altered to add a different voiceover.
The viral clip starts at 37:35 timestamp where he says to his fan, "Thank you, thank you for being there. I do not take them (his fans) for granted, I do not take you guys for granted. I know that I need to do good work and better work so that I always deserve the love."
A very similar edit of Bollywood actor Akshay Kumar was also viral to claim that he condemned the arrest of Khan. You can read our fact-check here.
Conclusion: An altered video of Hrithik Roshan is going viral to claim that he showed his support for Imran Khan.