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As I realised, the major issue is what type of text content you could have on your video based website. Definitely have a brief description of what your website actually is all about. In that text you should include your keywords or synonyms, but not in a spammy way. You could have H2 for the categories of your videos. You could have H3 for the name of the video (which am guessing is changing every other day). Try to optimize the page with as much content as possible but make sure you have a proper structure!

That's not ideal. If you're trying to do this programmatically in a CMS, perhaps there's a way to do something like: alt="Photo {Some Property}" alt="{Some Property}" alt="Photo" Using "Null" is worse than leaving it blank, I think.

As you clearly want to put ads on these pages, then I would expect that youll be sending it  organic traffic. Then just make the content a lot better. Why settle?

Hey, I did a quick run through your homepage and it looks like you have no Open Graph tags,  No Schema Markup,  You Meta title is way to long try to say as short and concise as possible. You have no meta description which is your marketing call for the consumer to click on your link in google's search results. You have WAYYYYY to many 's you should only have 1,  you should make the rest Consider adjusting your Alt Text so that they actuall describe all your images because currently they all say "link to video" which is spaming Hope this helps and is a great start