After posting to the WordPress.org forums, I was offered a few solutions on YouTube video embeds with WordPress 4.4:
Two work-arounds offered by Jeremy Herve:
These solutions were originally posted on this forum by Jeremy.
Alternatively, you can wait for the Jetpack update and follow the progress here. In the mean time, I will be using the second work-around offered by Jeremy.
Thank you Jetpack developers and Jeremy for all the work you do!
A simple YouTube video embed uses the video URL in a WordPress Post:
Alternatively, you can use the embed shortcode to embed a YouTube video:
However, using YouTube video embed shortcodes does not seem to be working:
Yields (Not originally working):
There are two work-arounds to make this work. Please see the beginning Update! section of this blog post for more information!
I am a heavy user of YouTube video embed shortcodes since they allow me to customize the video player to match my WordPress theme and disable the suggested videos that normally appear when a video ends. Thus, I am hoping this will be remedied in a future update!
Both of these features are extremely important additions to WordPress. With the recent release of the Calypso App from WordPress.com the development of WordPress, as a whole, has been phenomenal in the last few months!
This WordPress future looks extremely bright!