Chrome Version       : 65.0.3325.73
OS Version: OS X 10.13.4
URLs (if applicable) : youtube.com

What steps will reproduce the problem?
1. open a chrome window in Full Screen
2. visit youtube.com and play a video
3. Click to make the video go full screen

What is the expected result?
Fo video to be in full screen

What happens instead of that?
it flashes and the video exits full screen back to window mode, which the browser remains in full screen.

If browser is in window mode, video full screen works as expected

UserAgentString: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.73 Safari/537.36

No extensions installed

Google Chrome	65.0.3325.73 (Official Build) beta (64-bit)
Revision	a20ac61a553221683d2f152384ea3a3d80e4c1e9-refs/branch-heads/3325@{#457}
OS	Mac OS X
JavaScript	V8 6.5.254.21
Flash	28.0.0.161 /Users/fernando/Library/Application Support/Google/Chrome/PepperFlash/28.0.0.161/PepperFlashPlayer.plugin
User Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.73 Safari/537.36
Command Line	/Applications/Google Chrome.app/Contents/MacOS/Google Chrome --flag-switches-begin --autoplay-policy=document-user-activation-required --enable-device-discovery-notifications --enable-audio-focus --enable-offer-upload-credit-cards --enable-devtools-experiments --enable-embedded-extension-options --enable-fast-unload --enable-fullscreen-tab-detaching --enable-google-branded-context-menu --history-entry-requires-user-gesture --enable-hosted-app-quit-notification --enabled-new-style-notification --enable-nacl --enable-offline-auto-reload-visible-only --enable-offline-auto-reload --enable-permission-action-reporting --disable-push-api-background-mode --enable-quic --enable-scroll-prediction --site-per-process --enable-site-settings --enable-spelling-feedback-field-trial --enable-tab-audio-muting --enable-use-zoom-for-dsf=true --enable-webrtc-srtp-aes-gcm --enable-webrtc-srtp-encrypted-headers --enable-scripts-require-action --extension-content-verification=enforce_strict --load-media-router-component-extension=1 --reduced-referrer-granularity --tls13-variant=disabled --top-chrome-md=material --enable-features=AnimatedAppMenuIcon,AutofillCreditCardBankNameDisplay,AutofillCreditCardLastUsedDateDisplay,AutofillUpstreamRequestCvcIfMissing,AutomaticTabDiscarding,BackgroundVideoTrackOptimization,BlockTabUnders,BrowserTouchBar,ContentFullscreen,CreditCardAutofillTouchBar,DialogTouchBar,DoodlesOnLocalNtp,EnableHtmlBaseUsernameDetector,ExpensiveBackgroundTimerThrottling,FeaturePolicy,FullscreenToolbarReveal,HttpFormWarning,ImageCaptureAPI,MacMDDownloadShelf,MacSystemShareMenu,MacV2Sandbox,MaterialDesignBookmarks,MediaRemoting,NativeNotifications,NewAudioRenderingMixingStrategy,NewRemotePlaybackPipeline,NoScriptPreviews,NoStatePrefetch,OmniboxDisplayTitleForCurrentUrl,OmniboxSpeculativeServiceWorkerStartOnQueryInput,OmniboxUIExperimentShowSuggestionFavicons,OneGoogleBarOnLocalNtp,OptimizationHints,OriginTrials,OverflowIconsForMediaControls,ParallelDownloading,PermissionsBlacklist,SafeSearchUrlReporting,ScrollAnchoring,ServiceWorkerPaymentApps,SoundContentSetting,SpeculativePreconnect,SpeculativeResourcePrefetching,TabStripKeyboardFocus,TabsInCBD,TopSitesFromSiteEngagement,UseGoogleLocalNtp,UseModernMediaControls,UseNewAcceptLanguageHeader,VibrateRequiresUserGesture,WebPayments,WebPaymentsModifiers,WebRTC-H264WithOpenH264FFmpeg,brotli-encoding,fill-on-account-select,stop-in-background,top-document-isolation --flag-switches-end