225654 2021-05-11 07:43:30 -0700 Unable to play webm video from Cloudfront CDN unless it has .webm extension 2023-10-12 16:28:53 -0700 1 1 1 Unclassified WebKit Media Safari 14 Mac (Intel) macOS 11 NEW InRadar P2 Normal --- 1 darin.dimitrov webkit-unassigned ahmad.saleem792 bfulgham darin.dimitrov jer.noble webkit-bug-importer oldest_to_newest 1758900 0 darin.dimitrov 2021-05-11 07:43:30 -0700 I have uploaded the same webm video on two different CDNs and I am trying to play it in Safari using the <video> tag: <video controls crossorigin="anonymous" preload="auto" width="640" height="264"> <source src="https://snapshots.getfiddler.cc/jam-files/19516557d1484505be0d6df587883d2d?Expires=1702305315&Signature=AHclNVTFMZGVaVU0~q2-IeueiVjltCU79MZ0vpj9gu5t7VAetercr~b5RAm5S80UTRA0SSe7dluctbZieO3seMI9AUtZ3EdZMWlpZDSZXP3dpJVHBxbgkfcmSw393Medn1AtIiPObDnBHLaalHgDIl-o8H1m7XyIKINuR0tQXUIo7ZjIejz4fMZkSDQSKAvwHuD2mzcpZytgMMMho~7RcE5tqzbyM6OZHO-6ArqwoOpadLwY9OUa6L7JTEUauJ2MA44r15FU0muMXMr-OzAI3wxb9WHTGo8yNabvDJHDu2Mto2JQNkbkvHmN~SqwHSB1eNarLKjc2y2BP9cfqPPNog__&Key-Pair-Id=APKAIF6VYYHXO2CANQUA" type="video/webm;codecs=&quot;vp9&quot;"></source> </video> Live demo: https://jsfiddle.net/w1os50ud/ Inspecting the network tab, the media HTTP request fails without any error logged to the console. The same video file works if I use the following url: <video controls crossorigin="anonymous" preload="auto" width="640" height="264"> <source src="https://downloads.getfiddler.cc/foo/video_plain_vp9.webm" type="video/webm;codecs=&quot;vp9&quot;"></source> </video> Live demo: https://jsfiddle.net/5bmch2pa/ By looking at the network tab I cannot see any apparent difference between the two requests or responses. Do you have any idea why the first CDN doesn't work in Safari while it works on all other browsers? 1758936 1 darin.dimitrov 2021-05-11 09:59:37 -0700 It seems that the only difference between the 2 urls is that the one that works contains ".webm" extension and it is what makes the difference. Even though both set the Content-Type response header to "video/webm", if the url doesn't contain a .webm extension, Safari refuses to load it. 1761148 2 webkit-bug-importer 2021-05-18 07:44:17 -0700 <rdar://problem/78154594> 1984752 3 ahmad.saleem792 2023-10-12 16:28:53 -0700 I am able to reproduce this bug and the JSFiddle does not load any video content in Safari Technology Preview 180. While works fine in Chrome Canary 120.