YouTube video quality explained
Why some videos offer 1080p and others don't.
Why resolution isn't fixed
YouTube doesn't store every video at every resolution — what's available depends on how the uploader published it and how YouTube processed it. A downloader can only offer what's actually there; it can't add resolution that doesn't exist in the source.
Separate streams, merged for you
For higher resolutions, YouTube typically stores video and audio as two separate streams rather than one combined file. NoBsDL merges them into a single file automatically — you don't need to do anything differently, but it's part of why higher-resolution downloads can take a little longer to process than lower ones.
What sets your ceiling
Three things set the ceiling: what the source actually offers, resolution, and estimated final file size. A Free video choice must be both no higher than 1440p and no larger than 500MB. Offered choices up to 2GB that exceed either Free limit are Supporter-only, so every choice above 1440p — including 4K — requires Supporter access even when it is under 500MB. Choices above 2GB are not offered. MP3 uses a separate rule: up to 100MB is Free, and offered MP3 choices up to 2GB require Supporter access.
File size and resolution
Higher resolution means a bigger file. If you're on a limited connection or storage, a lower resolution may be the more practical choice even when a higher one is available.
Ready to download?
Use the YouTube Downloader to see the actual formats available for your video.