feate(video): added to backend data

Signed-off-by: A. Prooks <aprooks@live.ru>
hotfix(videoPlayback): can playback video if logged in youtube

Signed-off-by: A. Prooks <aprooks@live.ru>
Merge pull request #36 from aprooks/master

question without valid answer could be created
hotfix(youtube): latest videojs-youtube

Signed-off-by: A. Prooks <aprooks@live.ru>
chore: built assets

Signed-off-by: A. Prooks <aprooks@live.ru>
Merge pull request #39 from aprooks/feature/createVideo

Feature/create video
feat(problems): solved/unsolved filtering

Signed-off-by: A. Prooks <aprooks@live.ru>
test(ProblemsList): problems can be preloaded

Signed-off-by: A. Prooks <aprooks@live.ru>
chore: built projects

Signed-off-by: A. Prooks <aprooks@live.ru>
Merge pull request #41 from aprooks/feature/unsolvedProblems

(un)solved problems
Merge pull request #5 from ChrisBoesch/master

merging PRs