which video streaming has the highest video quality?

[jgy2001]

Using Firfox Downloadhelper Add-on for one particular Youtube movie, I found many video streams available.

Please tell me which one of these video streaming has the highest video quality?
What is the typical data file size per one minute of video play?

[360p] Full Movie).flv
[Medium] Full Movie).mp4
[HQ5] Full Movie).flv
[HQ36] Full Movie).3gp
[Mobile] Full Movie).3gp
[HQ134] Full Movie).mp4
[HQ133] Full Movie).mp4
[HQ160] Full Movie).mp4
[HQ139] Full Movie).mp4
[HQ141] Full Movie).mp4

Thank you

[CristianoA]

link to video ? or better use newest version of Internet Download Manager i think it has better bitrates detection

[jgy2001]

Thank you for your reply.
I am using Firefox add-on called downloadhelper.
In this Youtube case it detects 10 video streams available to download.
I want to know which one of these 10 has the highest video quality.

Thank vidoe streams available for this case are :
[360p] Full Movie).flv
[Medium] Full Movie).mp4
[HQ5] Full Movie).flv
[HQ36] Full Movie).3gp
[Mobile] Full Movie).3gp
[HQ134] Full Movie).mp4
[HQ133] Full Movie).mp4
[HQ160] Full Movie).mp4
[HQ139] Full Movie).mp4
[HQ141] Full Movie).mp4

[LoWi]

Hi!

Probably others can answer more in detail, I'm no expert. But these are my experiences:
Concerning the [320p], [720p] and so on: the higher the number, the better the quality and the bigger the file => the longer the download time. Some of them will be saved as a *.flv, some as *.mp4.

Concerning the [HQ160] and so on: I don't know this officially, just tested it: The downloaded file is way smaller than the [320p] version, so I think, the quality is much lower.

Any experts here, who can correct or confirm this?

[jgy2001]

Thank you LoWi. I tried another shorter Youtube with similar video streams available.

This is the file size I got downloaded:

[480p] in flv = 544MB
[Medium] in mp4 = 310MB
[HQ5] in flv = 166MB

I watch the video files and cannot really see the difference of these video file. Can you please tell me how to compare the video qualit? I am kind of confuse.

Thank you very much for your help

[theewizard]

this 'HQ5", HQ160
is new to me, never seen it before

i usually go for the 720p mp4, or larger, mp4 or flv, you can keep the webm and other formats

[theslydog]

Thank you for your reply.
I am using Firefox add-on called downloadhelper.
In this Youtube case it detects 10 video streams available to download.
I want to know which one of these 10 has the highest video quality.

Thank vidoe streams available for this case are :
[360p] Full Movie).flv
[Medium] Full Movie).mp4
[HQ5] Full Movie).flv
[HQ36] Full Movie).3gp
[Mobile] Full Movie).3gp
[HQ134] Full Movie).mp4
[HQ133] Full Movie).mp4
[HQ160] Full Movie).mp4
[HQ139] Full Movie).mp4
[HQ141] Full Movie).mp4

Unless you see 720p or 1080p then the [Medium] Full Movie).mp4 is the highest.
The others are for audio. Say you want the best audio for a song track then go for the [HQ141] Full Movie).mp4 and convert it to mp3.

[moi]

in DownloadHelper preferences you see this

[theewizard]

This is an old thread..over one year for any response

[Stears555]

At this time, it is the best! https://forum.videohelp.com/threads/368331-JavaScript-HEVC-H-265-bitstream-decoder-for-...-Chrome-iphone