TL;DR with the release of desktop Chrome 66 and Safari 11 autoplay with sound
is becoming widely unavailable or restricted in the web industry. If you plan on using autoplay, we recommend using a unified muted autoplay approach which works well on mobile and desktop. Muted autoplay in Radiant Media Player can
be achieved by using
muted settings set to
Autoplay (or autostart) allows media content or pre-roll advertisement to start without the need for a user interaction - most of the time autoplay happens when page loads.
Radiant Media Player provides support for autoplay of media content or pre-roll advertisement with live, DVR & on-demand streaming. Autoplay works with all supported streaming protocols (HLS, DASH or progressive download). Autoplay of outstream video ads is also supported. On modern mobile devices autoplay with audio is not available but muted autoplay can be used.
Years of autoplay with sound misusage in the industry have caused viewers to grow weary of autoplaying video with sound. Major actors in the industry have picked up on this trend and new autoplay policies are being rolled out into major browsers
and devices. Those new policies tend to limit autoplay capabilities while pointing at muted autoplay as the new standard for autoplaying video content, be it for mobile or desktop devices. With Radiant Media Player muted autoplay can
be achieved by using
muted player settings set to true. You can check our
compatibility table for more information on the subject.
Radiant Media Player is equipped with various detection and fallback mechanisms to insure your content remains watch-able whether you are using autoplay or not. When autoplay is requested but blocked by the browser (or another interfering mechanism), the player will gracefully provide a play icon to start content. We regularly test our player against Chrome 66+, Firefox (w/ media.autoplay.enabled set to false) and macOS Safari 11+ autoplay interference engines.
The below player settings can help fine tuning your autoplay set up.
Note about un-muting: these new policies in Chrome 66+ (and Safari 11+) also affect un-muting of video content or video ads. Specifically a
mouseover event is not enough anymore to un-mute
content if the user has not interacted with document prior to un-muting (this would cause the player to pause and throw a warning in the browser console). A full
touchend event is now required.
Low power mode on iOS 11+
According to our testing when an iOS 11+ device is in low power mode autoplay even muted is forbidden by the OS. This does not apply to iOS 10 and below. Radiant Media Player will properly handle autoplay requests when low power mode is engaged in iOS 11+ by providing a play button to initiate playback (a user interaction will be needed in such case as autoplay would have failed).
Data saver mode on Chrome before version 66 for Android
When data saver mode is enabled on Chrome before version 66 for Android autoplay even muted is forbidden by the OS. Note that this only applies to non-https web pages so on an https site (which should be the norm by now) autoplay won't be affected by data saver mode (meaning that muted autoplay will work as usual).
Command the player to autoplay content when init method is called. This works for media content and video ads. On modern mobile devices muted autoplay is supported for media content and video ads. Default: false.
The player knows 3 autoplay mode: autoplay with sound, muted autoplay or no autoplay. When
autoplay is enbaled and
detectAutoplayCapabilities is set to true, the player will attempt to detect what kind of autoplay mode
is allowed on the targeted devices, starting with autoplay with sound, then muted autoplay and finally no autoplay (in which case a play icon is made available to the user to explicitly start playback). Default: true.
Timeout in milliseconds for autoplay to force complete checking. Default: -1 (2500ms in desktop environment, 5000ms in mobile environment).
When using the setSrc API method this setting allows to control the behaviour of player after
srcchanged event has fired. When set to true this setting will cause content to autoplay just after
srcchanged event. When
set to false the player will remain in a pause state after
srcchanged event. Default: true. When set to true this setting will only have effect after player has been initialised either through a valid user interaction or successful
autoplay request. This setting is also compatible with playlist/related but when
srcChangeAutoplay is set to false the
relatedUpNextAutoplay settings are automatically set to false.
Limits the number of autoplay across browser sessions (using localStorage). You may use the
resetAutoplayCount API method to reset
autoplayCount. Default: Infinity.
This API event will fire when
autoplay is set to true and autoplay of content or pre-roll ad was a success.
This API event will fire when
autoplay is set to true and autoplay of content or pre-roll ad was a failure (likely due to an autoplay interference engine).
Reset autoplay count set through the
With the release of Chrome 65 autoplay of HTML5 video content in an iframe has been disabled by default. It must be enabled through autoplay feature policy. This change in autoplay policy for iframes means that an iframe holding an HTML5 video player needs to be explicitly allowed to autoplay by the parent window. This is the same in principle as what we have done in the past for allowing an iframe to go fullscreen. If you are using an iframe within an iframe then each iframe needs to be explicitly allowed to autoplay. Note that autoplay is allowed by default on same-origin iframes so enabling autoplay feature policy is only required for cross-origin iframe. Example:
<iframe width="640" height="360" src="http://www.mydomain.com/embedded-player.html" style="border:none;" allowfullscreen allow="autoplay; fullscreen"></iframe>
We have tested this set-up when Radiant Media Player is used in an iframe and can confirm this is generally working for Chrome 65+. It is likely other browsers will implement this feature as well in the near future. In case autoplay is blocked
due to autoplay feature policy Radiant Media Player shall provide a play button so that playback can be initiated by a user gesture, in such case the
autoplayfailure API event shall fire. You should also note the need to use the
allowfullscreen attribute in complement to the
allow attribute in order to support browsers that do not support
If you are using amp-iframe and autoplay you need to add
allow="autoplay" to your amp-iframe element.