Such a great idea and initiation!
Points and ideas:
* By default - typing www.trials-videos.com it redirects to the Non-secure version (http), you can change it to auto redirect to https.
* The search form is being displayed twice. next to each other :
* Maybe alow other users to add videos and tag them? * Maybe you get get more help by publishing the source code on Github, so people (like me) could help you out extending and improving it.
* Maybe allow unlimited tagging, allowing users to tag themselves on vids they are on, then enable search by people
attached here a screenshot from the advanced search.