FULL PRODUCT VERSION :
JDK 1.8.0_72-ea-b05

ADDITIONAL OS VERSION INFORMATION :
MacOS X 10.10.5

EXTRA RELEVANT SYSTEM CONFIGURATION :
MacBook Pro Retina

A DESCRIPTION OF THE PROBLEM :
When I load the youtube page into a WebView it currently initially shows a video add from Porsche which plays fine with this latest version of the JDK. It did not play any videos with previous versions. But when I then click on some link to show another video the JVM crashes with the following output on the console.

[17:17:02.581] vtDecompressionDuctCreate signalled err=-8973 (err) (Could not select and open decoder instance) at /SourceCache/CoreMedia_frameworks/CoreMedia-1562.238/Sources/VideoToolbox/VTDecompressionSession.c line 1181
[17:17:02.973] FigLimitedDiskCacheProvider_CopyProperty signalled err=-12784 (kFigBaseObjectError_PropertyNotFound) (no such property) at /SourceCache/CoreMedia/CoreMedia-1562.238/Prototypes/FigByteStreamPrototypes/FigLimitedDiskCacheProvider.c line 947
Oct 30 17:17:03 ip8.fritz.box rtcreporting[5918] <Info>: logging starts...
Oct 30 17:17:03 ip8.fritz.box rtcreporting[5918] <Debug>: setMessageLoggingBlock: called
Oct 30 17:17:03 ip8.fritz.box rtcreporting[5918] <Debug>: startConfigurationWithCompletionHandler: Cached 0 enabled backends
Oct 30 17:17:03 ip8.fritz.box rtcreporting[5918] <Debug>: setUserInfoDict: enabled backends: (
)
Oct 30 17:17:03 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
Oct 30 17:17:03 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
Oct 30 17:17:13 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
Oct 30 17:17:13 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
Oct 30 17:17:13 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
Oct 30 17:17:13 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
Oct 30 17:17:13 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
Oct 30 17:17:13 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
Oct 30 17:17:13 ip8.fritz.box rtcreporting[5918] <Debug>: sendMessageWithCategory: (null)
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x000000013019989e, pid=5918, tid=121375
#
# JRE version: Java(TM) SE Runtime Environment (8.0_72-b05) (build 1.8.0_72-ea-b05)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.72-b05 mixed mode bsd-amd64 compressed oops)
# Problematic frame:
# C [libjfxmedia_avf.dylib+0x789e] AVFKernelComponent::ProcessBufferLists(unsigned int&, AudioBufferList const&, AudioBufferList&, unsigned int)+0x22
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /Users/mpaus/Projects/NewEclipseWorkspace/mpGAFOR-GUI-JavaFX/hs_err_pid5918.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#


REGRESSION. Last worked in version 8u66

ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_72-ea"
Java(TM) SE Runtime Environment (build 1.8.0_72-ea-b05)
Java HotSpot(TM) 64-Bit Server VM (build 25.72-b05, mixed mode)

It worked with previous versions in so far as they did not crash the VM.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Load youtube into a WebView and select a video to play. I don't know whether this bug is related to the initial commercial which youtube often shows at the top of the page.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Don't crash the VM and play the video.
ACTUAL -
VM-crash.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
(see attached crash report)

REPRODUCIBILITY :
This bug can be reproduced always.