HTTPS-E v3.5.3 breaks youtube embedding on other sites (FF 29 / Chrome)

The video on this URL http://norilskonline.ru/v-mire/kosmos/681-neopoznannyy-obekt.html is not played (and preview is not shown) unless I turn off "YouTube (partial)" rule.

Trac:
Username: Ache

changed milestone to %HTTPS-E 3.5

added component::https everywhere/eff-https everywhere httpse-ruleset-bug milestone::HTTPS-E 3.5 owner::zyan priority::high reporter::Ache severity::normal status::new type::defect labels

Also confirmed on Chrome.

Trac:
Summary: HTTPS-E v3.5.1 breaks youtube embedding on other sites (FF 29) to HTTPS-E v3.5.1 breaks youtube embedding on other sites (FF 29 / Chrome)
Priority: normal to major

Also confirmed with HTTPS Everywhere 2014.4.25 in Google Chrome 34.0.1847.131

I can reproduce the bug in this page. http://sol.sapo.pt/inicio/Cultura/Interior.aspx?content_id=105304

Trac:
Username: NewEraCracker

See also: https://trac.torproject.org/projects/tor/ticket/4408 and https://code.google.com/p/gdata-issues/issues/detail?id=4299 Though this might be different, it looks like that bug may be Chrome only, where this one I can reproduce on Firefox.

Disabling BOTH the Google API AND Youtube rulesets on a page fixes this bug.

Still present in 3.5.3

Trac:
Username: Ache

Trac:
Username: Ache
Summary: HTTPS-E v3.5.1 breaks youtube embedding on other sites (FF 29 / Chrome) to HTTPS-E v3.5.3 breaks youtube embedding on other sites (FF 29 / Chrome)

Probably related with issue #12407 (moved)

Trac:
Username: NewEraCracker

I can still reproduce in FF31.0 with master and with 3.5.3 at http://norilskonline.ru/v-mire/kosmos/681-neopoznannyy-obekt.html, but the sol.sapo.pt link is now broken. I cannot reproduce in Chrome.

It's pretty mysterious. With the rule enabled, I don't see any additional errors. I do see HTTPS Everywhere rewriting the YouTube URL, but no subsequent fetche sin the Network panel for the rewritten URL.

From comment3, I agree that something like https://trac.torproject.org/projects/tor/ticket/4408 (content introspection differences) might be involved.

I also note that the problematic page uses http://norilskonline.ru/engine/editor/scripts/common/mediaelement/mediaelement-and-player.min.js, which might be trying to do something smart about loading various versions of the Youtube player.

Also worth noting that other YouTube embeds, such as http://boingboing.net/2014/08/22/anti-super-pac-ads-from-anti-s.html, appear to work fine. So I think this is specific to the embeddeding JS used.

Set all open tickets without a severity to "Normal"

Trac:
Severity: N/A to Normal

mentioned in issue #11767 (moved)

mentioned in issue #12407 (moved)

moved to tpo/applications/https-everywhere-eff#11663 (closed)