Automatically Post Reddit to YouTube: Complete Guide
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Reddit reaches Young adults interested in niche communities while YouTube connects with Broad demographic, skews male 18-34, letting you expand to a new audience segment. While the content formats differ, repurposing Reddit content for YouTube helps you reach audiences who prefer a different medium. Whether you want to auto-post everything or filter by hashtag, this guide covers everything about Reddit to YouTube automation. Learn how to crosspost from Reddit to YouTube or repurpose your content for maximum reach.
Reddit to YouTube Content Compatibility
Video
Direct Transfer
Images
Not Supported
Text/Captions
Truncated
Reddit vs YouTube: Platform Specs
| Spec | YouTube | |
|---|---|---|
| Caption Limit | 40,000 chars | 5,000 chars |
| Max Video Length | 15min | 12h |
| Preferred Aspect Ratio | 16:9 | 16:9 |
| Max Video File Size | 1GB | 256GB |
| Carousel Support | Up to 20 items | No |
| Hashtag Strategy | Not used | Up to 60 |
| Link Support | Yes | Yes |
| Primary Audience | 18-39 | 18-49 |
Why Automate Reddit to YouTube?
Build a consistent brand presence across Reddit and YouTube with automated distribution
Grow your YouTube following by consistently sharing your best Reddit content
Manual Posting vs Automated Distribution
Manual Method
- ✗Upload the same video to YouTube after posting to Reddit
- ✗Copy and reformat captions for each platform
- ✗Constantly context-switch between apps
- ✗Risk forgetting to post to YouTube
- ✗Spend 10-15 minutes per post managing distribution
- ✗Miss peak posting times on YouTube
PostOnce Automation
- ✓Post to Reddit like normal—we handle YouTube
- ✓Captions automatically adapted for YouTube
- ✓Stay in your favorite platform's workflow
- ✓Every Reddit post automatically appears on YouTube
- ✓Set up once in under 60 seconds
- ✓Consistent posting schedule maintained automatically
Manual posting might work when you're just starting out, but as your content volume grows, automation becomes essential. The difference isn't just time saved—it's the ability to maintain a consistent multi-platform presence without burning out.
How to Set Up Reddit to YouTube Automation
Connect Reddit and YouTube
Link both social accounts to PostOnce using secure OAuth authorization.
Reddit uses standard OAuth and YouTube requires standard authorization. Both connect in seconds.
Configure your automation rules
Choose to crosspost everything or filter by hashtags, content type, or custom rules.
Since Reddit allows longer captions (40,000 chars) than YouTube (5,000 chars), you may want to review caption truncation settings.
Post on Reddit as usual
Create content on Reddit and PostOnce handles YouTube distribution.
Both platforms use 16:9 format, so your content transfers seamlessly.
Flexible Automation Options
Control exactly how your Reddit content gets distributed to YouTube with powerful automation rules.
Post Everything
Every Reddit post automatically goes to YouTube
Filter by Hashtag
Use specific hashtags to control what gets crossposted to YouTube
Custom Rules
Set advanced filters based on your Reddit to YouTube workflow needs
Most creators use hashtag filtering to maintain control over their crossposting workflow. For instance, you might want all your Reddit tutorials to go to YouTube, but keep personal content separate. Simply add a specific hashtag like #autopost to your Reddit caption, and only those posts will be distributed.
If you want to repurpose content from Reddit to YouTube, you can also customize how captions, formats, and media are adapted for each platform's unique audience and requirements.
What to Expect
Works Well
- ✓Both platforms prefer 16:9 video, so no reformatting needed
- ✓Links in posts are supported on both platforms
Needs Adaptation
- ~Captions may need shortening (40,000 chars to 5,000 chars)
- ~Hashtag strategy differs between Reddit and YouTube
- ~Carousels from Reddit need to be converted to single images or video
Doesn't Transfer
- ✗Most content elements transfer successfully
Known Limitations
- ⚠Captions over 5,000 characters will be shortened for YouTube
- ⚠Reddit carousels will be posted as single images on YouTube
Frequently Asked Questions
YouTube supports videos up to 12 hours long, 256GB file size, in 16:9, 9:16, 1:1 aspect ratios. Captions can be up to 5,000 characters. Your Reddit videos will fit within these limits.
Yes. PostOnce works with both personal and business accounts on both Reddit and YouTube. Connect via OAuth authorization—your credentials are never stored.
Reddit's peak engagement is 6-8 AM, 12-2 PM (US timezones), while YouTube's peak is 12-4 PM, 8-11 PM. PostOnce can publish to YouTube at optimal times regardless of when you post on Reddit.
Hashtags are not used on Reddit. For YouTube: Up to 60 hashtags allowed; 3-5 relevant hashtags recommended in description. PostOnce lets you customize hashtag handling—keep them, remove them, or set platform-specific hashtag strategies.
PostOnce handles unlimited crossposting within your plan's limits. Every time you post on Reddit, it's automatically shared to YouTube—no per-post limits on automation.
Ready to Automate Your Reddit to YouTube?
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