Reddit videos with audio: the merge explained
Reddit's defining quirk is that it stores each video as two separate streams — one for picture, one for sound — using MPEG-DASH adaptive streaming. The browser stitches them together at playback, which is why a video sounds fine on Reddit but the file you save from a basic downloader is silent: that tool only grabbed the video stream and ignored the audio. The fix isn't a setting, it's a tool that fetches both and re-merges them.
SnapFetchr detects the matching audio track, pulls it alongside the video, and muxes the two into one synchronized H.264/AAC MP4 — automatically, with nothing to configure. The result is the same file you'd get from a manual ffmpeg merge, without the command line. If a merged download is still silent, the source itself was silent: many Reddit memes are uploaded as soundless loops, so check the speaker icon on the original post.
Reddit app links and URL formats
The cleanest link to download is the post permalink, which looks like reddit.com/r/<sub>/comments/<id>/<slug>/. In the Reddit app, tap the share icon and choose Copy Link to get it; on the web, copy it straight from the address bar. SnapFetchr also accepts old.reddit.com, m.reddit.com, and redd.it short links, so whatever format the app hands you will resolve.
One thing to avoid is a comment-specific link — those point to a single comment rather than the post and won't carry the video. Make sure the URL ends at the post (the /comments/<id>/<slug>/ portion) rather than a deeper comment path, and the fetch will find the v.redd.it video behind it.
Crossposts, Reddit GIFs, and external embeds
Crossposts are the most common stumbling block. A crosspost lives in one subreddit but references a v.redd.it video originally posted in another, sometimes behind redirects that break automated access. SnapFetchr usually resolves both the crosspost and the original URL, but if a crosspost fails, open the original post it points to and use that link instead.
Reddit-hosted GIFs (.gif and .gifv posts) are converted to MP4 on download. External embeds are a different matter: a post that links out to YouTube, Streamable, or Imgur hosts the video on that platform, not on Reddit, so you'll need that platform's downloader rather than a Reddit one.
NSFW posts and private subreddits
NSFW videos download normally as long as the post is publicly viewable. The exception is subreddits with a mandatory age-verification gate — if the content can't be reached without logging in and confirming age, no downloader can access it. A quick incognito-window test shows whether a post is genuinely public.
Private subreddits are off-limits by design: they require an approved login, so their posts aren't publicly accessible and can't be fetched. As with every platform SnapFetchr supports, the rule is that the content has to be reachable without an account for the download to work.