Hi Yogendra, not bad for your first video. Here are some suggestions:
1. You need to use better and larger titles so they can be read easily. Keep titles on screen so the viewer can comfortably read them twice.
2. You should limit the effects, as most of them are not necessary or perceived as professional. I saw some spinning effects, white flashes, etc. If you want something to happen on the beat of the music, try cutting different shots to the music.
3. Lastly you need to color correct your video. Some shots have too much contrast, some are to bright, etc. Color correction can help a great deal with the quality of your video.
4. In the future, you may wish to vary the focal length of shots. Get establishing shots and also close ups to help you convey the emotion of the wedding.
But overall congratulations on your first video!
Greg Ball, President
Ball Media Innovations, Inc.
https://www.ballmediainnovations.com