Only 360p and 720p quality selectable

[ATA250]

Was working fine for a few vids, now I only have 360p and 720p quality that can be selected, no other options.

Firefox 38.0.1
Dev build 525

[SuperSajuuk]

That is a symptom of users who disable DASH playback in the preferences.

[ATA250]

Great :( Disabling DASH was literally the only reason I wanted to use this for.

[SuperSajuuk]

DASH playback is actually pretty cool. I still don't get why people want to turn it off. :/

[ATA250]

My internet connection maxes out at about 1.5mbps is why.

[SuperSajuuk]

@ATA250 Not much of an excuse, because I also have about 1.5mbps (sometimes hitting 2mbps) and can buffer 720p60 without issues at all.

[ATA250]

I'm also one of 5 people using the connection at once :)

[Aolorn]

I concur. My Internet connection can get really slow and unstable so being able to preload just a few seconds of the video and having to preload everything from scratch almost everytime I want to replay the video or return to specific point used to be major pain in the backside.

[FichteFoll]

I have the same problem on FireFox 38.0.5 with DASH enabled, but only on my laptop. The problem appeared for all videos, until I finally found this fix. media.mediasource.webm was disabled for me and enabling it also made the HTML5 page show a check mark at VP9. However, some videos were still only watchable in 360p.

The only way I managed to fix this was to tell YTC to use "Flash" and not HTML, as you can't even switch to HTML5 on the youtube html5 page.

Video that worked after first fix: https://www.youtube.com/watch?v=sb9fHU4d3Ds
Video that required flash: https://www.youtube.com/watch?v=lki1y2wa820

[Zarggg]

@FichteFoll: Both videos work properly for me using the experimental HTML5 player.
Using the standard HTML5 player gives me a 1080p@25fps WebM/VP9 video for your first link and a 1080p@25fps MP4/AVC video for the second.
Forcing the Flash player also served videos at 1080p. I am assuming they are MP4, but I have no way of verifying the encoder in the Flash player.

Curiously, the only encode using WebM on the second video is 360p VP8 (Vorbis audio) in non-DASH format.

[FichteFoll]

@Zarggg can you check if your media.mediasource.webm setting is set to true? The first video served a vp9 video 720p video after I did that while the second was only vp8 360p. Propably because, as you mentioned, it doesn't feature DASH Webm/VP9 videos for the other resolutions. Here's another video that seemingly has the same limitations: https://www.youtube.com/watch?v=qsQPEqPCtuk

[Zarggg]

Yes, that preference is set to true. When set to false, Firefox will not load WebM videos.

I generally use the beta versions, so I'm on 39b2 right now. I do not recall having any issues with WebM/VP9 when 38.0.5 was still in beta, but I don't think YouTube was preferring that format back then as much as they are now; the move to VP9 only started in April if I recall correctly.

Something strange seems to be going on. For the link you just provided, the only quality YouTube will give me with YTC disabled is 360p MP4. I am only able to get the 720p non-DASH stream if i have YTC enabled.

Complete YouTube Saver seemed to indicate that a 1080p DASH stream is available when the video was first loaded in a new tab, but I was not able to select it and the options for all DASH formats except for 360p MP4 disappeared shortly after.

For comparison, Chrome delivers MP4 streams for all three of the videos you linked, the first two using DASH and the third non-DASH. I don't have an extension for Chrome that gives me a comprehensive list of all available streams like CYTS.

Edit: Just tried those links again in Chrome with YTC disabled. I am able to get a 1080p DASH format stream on the third video.