Autoplay fix when delay is very low.

[repalash]

Autoplay doesn't work when the delay is low(like 0.01f), probably because the video not loaded or player not ready.
Fixed by checking if Play() was successful else try next frame.

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[repalash]

I signed it!

[googlebot]

CLAs look good, thanks!

[rusmaxham]

Fixed in the latest release.