fix videoPlayback html attributes

[esterlus]

Description:

Video tags assume that autoplay/controls should be set if absent from video elements.
This seems to deviate from the expected standard as described here:
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#Attributes

webkit-playsinline is superseded by playsinline and should be set as well

Changes proposed:

• adhere autoplay and controls attributes if not set (do not automatically assume autoplay / controls is intended)
• check video tag correctly and set playinline where webkit-playsinline is set

[ngokevin]

Thanks!