Read the analyzed video rows, not a fixed quality chart
Paste a direct public watch-page or youtu.be link to one upload you may save. After analysis, compare each returned row's container, height and size information. A row absent from the result cannot be selected. MP4 and WebM are different containers; a source may expose one but not the other at a particular resolution. Use the MP4-only tool only when that container is required.
High resolution video can need a separate audio track
YouTube often serves higher resolution picture and audio as separate streams. SaveFromNet can offer a finished file when a compatible sound stream is accessible and the streams can be merged. It does not list a picture-only stream as a normal video download with sound. If the source has no usable audio partner, the desired HD row may be missing even when the picture appears in the player.
Length, bitrate and the 512 MB ceiling matter
Resolution alone does not determine file size: duration, codec, video bitrate and audio bitrate all affect the finished file. SaveFromNet rejects known or strongly estimated results over 512 MB; a job with unknown size can still stop if it reaches that limit. For example, 25 minutes at a combined 19,000 kbps is roughly 3.6 GB before overhead, so a tiny 4K size estimate would be misleading. Try an available lower resolution for a long upload.
Only download content you own or have permission to use. No login, paywall, DRM, or private-access bypass is offered.
Questions about this topic
Can I force 4K if it is missing?
No. Only an accessible and processable source combination can appear in the result. Changing the label would not create the file.
Does 1080p always have sound?
Not as one source stream. The service needs compatible audio to prepare a finished video with sound.
Why does estimated size say unknown?
The source may not report enough reliable bytes or bitrate data for the complete video and audio combination. Unknown is more accurate than an audio-only or invented total.