Any media with audio refuses to play. It doesn't play silently, it does not play at all. This affects YouTube and SoundCloud, for instance. The problem appeared after the update of Qt from 5.13.1 to 5.14 on openSUSE Tumbleweed.
Works fine for me on Artix.
Can confirm this on opensuse tumbleweed as well using KDE unstable repos. Falkon refuses to reproduce media, from youtube, twitch, dtube, bitchute.... The funny part is the damns ADs are not affected as well as Thumbnail previous on youtube. Also funny is that Mixer.com stream work but with no audio. Reseting falkon by deleting ~/.confing/falkon did not helped. No journal entries about it. For this video: https://www.youtube.com/watch?v=Tz9d7By2ytQ Falkon console shows: <link rel=preload> must have a valid `as` value watch?v=Tz9d7By2ytQ:1 Refused to display 'https://accounts.google.com/ServiceLogin?passive=true&uilel=3&service=youtube&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26next%3D%252Fsignin_passive%26feature%3Dpassive%26app%3Ddesktop%26hl%3Den&hl=en' in a frame because it set 'X-Frame-Options' to 'deny'. userscript:_falkon_webchannel:449 Uncaught DOMException: Blocked a frame with origin "null" from accessing a cross-origin frame. at userscript:_falkon_webchannel:449:309 at userscript:_falkon_webchannel:449:1064 remote.js:34 Mixed Content: The page at 'https://www.youtube.com/watch?v=Tz9d7By2ytQ' was loaded over HTTPS, but requested an insecure script 'chrome-extension://pkedcjkdefgpdelpbcmbmeomcjbeemfm/cast_sender.js'. This request has been blocked; the content must be served over HTTPS. ita @ remote.js:34 [Deprecation] HTML Imports is deprecated and will be removed in M80, around February 2020. Please use ES modules instead. See https://www.chromestatus.com/features/5144752345317376 and https://developers.google.com/web/updates/2019/07/web-components-time-to-upgrade for more details. remote.js:34 Mixed Content: The page at 'https://www.youtube.com/watch?v=Tz9d7By2ytQ' was loaded over HTTPS, but requested an insecure script 'chrome-extension://enhhojjnijigcajfphajepfemndkmdlo/cast_sender.js'. This request has been blocked; the content must be served over HTTPS. ita @ remote.js:34 The resource https://r1---sn-jvqxuxa-aghe.googlevideo.com/generate_204 was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally. The resource https://i.ytimg.com/generate_204 was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally. The resource https://r1---sn-jvqxuxa-aghe.googlevideo.com/generate_204?conn2 was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally.
Same here, though I had impression (maybe wrong), that breakage was after update to 5.14.1, not 5.14.0. And this is not Falkon specific, any QtWebEngine is affected on my system. So I think this is either some openSUSE Tumbleweed problem or Qt upstream. I've created openSUSE Tumbleweed bug report: https://bugzilla.opensuse.org/show_bug.cgi?id=1163744
Debugged and filed upstream as https://bugreports.qt.io/browse/QTBUG-82186