Restore video tag attributes on tech change

New attempt to fix this issue #1367 related to the webkit-playsinline attribute missing.
I develop backends or exotic devices, I will tell you if videojs work on chromecast, embed ios, android, xbox one, wii-u, amazon-fire-tv, samsung tv, … and you tell me if it work on ie8 please ? I can't spend hours to setup a ie8… For the createEl I still don't get it, I agree but my knowledge of videojs is too limited for that. We can't test createEl if we don't have a Html5 tech object and we can't create one without the player object, can you drive to the right direction ?