Android AND iOS mobile device app solution

I currently have an app project in motion that i based on a framework application called MoSync. My reasons for using MoSync are due to not having coded an app before and being a web developer im used to html, css, js and php. I have created an app that does what i require however i am unable to make the html hybrid app display videos. I researched a solution that requires coding to be done in the app sdk side to create a function that can be called from the html page via js to use the devices native video player to show the video full screen that i link to from a html a tag. I have since learnt that using MoSync maybe causing me more problems than i need and a much faster app could be obtained by having an app coded purely in native form. This leads me to a few problems. 1. My apps pages need to remain html5 based, therefore the app must immediately load into a web view to display my html pages as the apps menus. 2. The app must always force landscape view. 3. I must be able to click on a thumbnail link on my html pages to load a video full screen in the devices native video player. 4. I need to provide the option for the user to make the video available offline and thus allow the video to be downloaded to the users device and from then on the link will load the video from the users device and not the url. Ideally the native app should be coded as such so that all further work can be done by myself purely in html, js, css and if possible php. I am not aware if the video downloads are placed in the apps folder on the device or in the devices media folder, ideally the files would be added to the apps folder on the users device. It is my understanding that features such as viewing the video in the native video player and checking to see if the video is already on the device else load the video url will be coded in the native app in such a way that i access theses functions in the html via js. Provided all the above is possible, please quote me on your fastest turn around and cheapest price, keeping in mind that i am not expecting to have to edit the actual app itself just my html. Initially a working example will be needed to a standard html page with a video link, once this can be seen working on both Android AND iOS mobile device i will then provide the actual html content that needs to be within the app itself, some of which will link to live pages which are hosted. Any assistance in setting up my end to be able to edit the html content within the app and then recompile would be appreciated. Please note this app is required for both Android AND iOS mobile devices. Very urgent so your fastest turn around times please and cheapest quotes as this job is already over budget and running out of time. There will be much more further work to come if the right freelancer can be found.