Why download managers/video downloaders give different video sizes?

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Deleted member 2913

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Tested site - YouTube
Tested software - Free Download Manager 5 technical preview, Eagleget, 4kvideodownloader & ClipConverter online site.

I tested many 1 mins - 3 hours videos from verified channels on YouTube with the above downloaders.
All gives different sizes & sometimes big difference.
I think this is due to video/audio bitrates, etc... i.e downloaders using their settings like bitrates, etc... for video downloads, right?

Does YouTube provides videos with their default settings i.e 720p videos with particular bitrates, etc..., 480p videos with particular bitrates, etc...?
And any downloaders that gives or gives an option to download YouTube default settings videos?
 
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BoraMurdar

Community Manager
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Aug 30, 2012
6,598
Because webm and mp4 videos have different sizes mainly because of different container characteristics. Also some videos are in 60fps so they will be obviously bigger in size. It depends in what format the video is downloaded and also if the downloader is demuxing video while downloading. While demuxing some downloaders uses different settings but mainly FFMpeg default ones.

If you upload a video with certain bitrates Youtube shouldn't change them. Keep in mind also that 3 min SciFi movie trailer will be obviously bigger in size than 3 min chess game.
 
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Deleted member 2913

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I meant the same format, fps, containers, etc... like 720p, 23 or 24 fps, mp4, etc...
 
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Tabeer

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Dec 3, 2015
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Is download Manager gives options like 720p or 480p etc before start the downloading.
 

jamescv7

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Mar 15, 2011
13,070
@Tabeer: Yes, one of the prominent download manager program is Eagleget which contains MediaGrabber for selection of quality video.
 
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