Make good content, use right title tag and a informative description. Use tags and choose a good thumbnail that explains your video better and then share it on your other social profiles. This is how we do video marketing for our clients. Hope this helps!

there are a few apps that u can use, the one I am familiar with is "Love quotes" and it has nice pictures which u can send as a test message. Hope it works

search engines crawl the internet all the time and meta tags are like an introduction of the page to them. The refer to meta tags as the window to page and know when to deliver that page for a searched query

Double tap on home button and on the background apps displayed hold the app and move  your finger like throwing away.

You can look at this post of mine - it explains it all in more detail:

phonesappstabs.com/how-to-close-your-background-app-in-i