How to automatically play unmuted video when changing slides - html5-video

I have a video slideshow that is created using Swiper JS. Ideally I'd like to make the videos automatically play without muting them when changing slides. I have a play button on top of the video. I don't want users to keep clicking the play button when they change the slides. Is there a way to achieve this without muting the videos? I see the web-based Tiktok site has been doing it. Not sure how they managed to do it.
Thanks in advance!

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How to create background music in react native

I have seen a lot of tutorials on creating music which can be activated with a button but not on creating background music without a button. Is it possible to create background music which play throughout the app?
I use this link for https://www.youtube.com/watch?v=MpQ1sVku-D0&t=482s to make background music in the page where it is connected to all the route in my app. If yours is local file, go to https://www.youtube.com/watch?v=MpQ1sVku-D0&t=482s and just change the audioclips based on video.(The coding is the same other than it uses url).
This is part of the code to play without using button that need to modify since video mention button.
Hope this helps!

Video.js need to make full screen without adding allowfullscreen to parent iframe

I'm working in an environment where I can't add allowfullscreen to the parent iframe of the page that contains the videojs videos. Currently, the full screen button does not make the video go full screen.
If I embed a youtube video for instance on the same page it has the ability to go fullscreen.
Is there a way to modify the videojs code to work in a similar way? My javascript knowledge is average so this might be too big for my britches.
Thanks,
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How to save video overlay iphone xcode

I have created an overlay to an MPMoviePlayerController using the following code, which essentially adds a subtitle in my iphone xcode project:
[_mpMoviePlayerController.view addSubview:lblOverlayView];
I want to now be able to save the video (and eventually facebook, but I don't NEED help with that, just the saving would be fine) with the subtitles. It is playing a preloaded video, and the dynamic part is the subtitle, which is whatever text the user enters (which becomes the value of lblOverlayView. If you have any other ways of adding text that can very over the top of a preexxisting/preloaded video and then saving/emailing/facebooking it, that would also be great! Just some way of doing it!!
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Turning Google Earth plugin animation into a video

I've created an animation which runs inside of the Google Earth plugin (browser) and I'd like to somehow encode this animation into a video format that I can upload to YouTube or a related video site. Are there any tools out there to help me do this?
**EDIT: more detail
This animation changes depending on user input. So it needs to be scalable. The user would click a button: download video after which a server would convert the animation.
You can use FRAPS to record a video of the animation running on your machine.

Objective-C iPhone - Playing youtube within an app

Is it possible to play youtube using the method described in this url
http://iphoneincubator.com/blog/audio-video/how-to-play-youtube-videos-within-an-application
but with a custom button? (i.e in the picture in the link, it's of a baseball game with the play button overlay on top, I want that to be a custom button that I create)
Thank you,
Tee
No, the way that you play YouTube videos is by opening it in the mobile site, which takes you to the embedded QuickTime/YouTube viewer. It doesn't play them in the view of your app like the QTView would on a Mac.