There are several strategies that can help increase the number of subscribers on a YouTube channel up to 50,000 in few months of time span.

Following Strategies has to Follow:

Consistency: Post high-quality videos on a regular schedule so that your subscribers know when to expect new content.

Engage with your audience: Respond to comments and questions from your viewers, and encourage them to engage with your content by asking them to like, share, and comment on your videos.

Collaborate with other creators: Collaborate with other YouTube's who have a similar audience to yours. This can help you reach new viewers and gain more subscribers.

Optimize your videos for search: Use relevant keywords in your video titles, descriptions, and tags to help your videos show up in search results.

Promote your channel on social media: Share your videos and channel on social media platforms like Twitter, Facebook, and Instagram to reach a wider audience.

Paid advertising: Consider running ads on YouTube to reach more viewers and gain more subscribers. Google ads Campaigns, Facebook Ads. Instagram ads and LinkedIn Ads to increase videos views.

Create engaging content: Make sure your videos are interesting, informative, and engaging so that viewers want to subscribe to your channel.

By implementing these strategies, you can increase your YouTube channel's subscriber count up to 50,000 and beyond. However, it's important to remember that building a successful YouTube channel takes time and effort, so be patient and persistent in your efforts.