I have a little experience saving a marriage so I'm going to stick my two cents in here and give you some advice.
First, everyone loses the exciting spark that was once had when the relationship was new. That's normal. but what really drives a wedge in between two people is the fact that woman are completely different creatures than men. You have heard of "men are for Mars, Woman are from Venus"? Read it if you haven't
In this case something like a video, a great gesture on your part to show your love and make a romantic notion, can actually certify to your significant other that they want that spark again (something that can only be had with someone new).
The first step is understanding that a marriage that is failing is usually due to the long term difference between men and women. Men and women are just not meant to be in long term relationships, but that "spark" is like glue that holds two people together.
Men (generally), opposite to popular belief, need a partner (they want their mommy). So, they latch on and want someone to take care of them. Women on the other hand, want to feel safe and protected, and this doesn't always translate from romantic notions (although it's a good start).
You have to think long term. You have to figure out what your wife "needs" in a man (try asking) and then change a little every day. She'll notice, believe me. If you try to change everything about you overnight, you'll overload, resent her and crash and burn. Flowers and videos, while a nice gesture, are putting a band-aid on a crack on Hoover damn. It's a very short term thing. It also shows an overtone of desperation which can work against you since the act could seem insincere in undertone.
Try to do small things everyday to show you are the man for her. The most common compliant is that "You don't listen to me when I talk" (listen to her when she drones on) and show compassion. It'll make her feel more important than any video or flowers ever will. Women use like 100 words to our 1 when getting an idea across. We think logically, they think emotionally. So their language is filled with expressions of "how they feel", which we cannot really relate to. We see a problem and want to find a solution. A woman sees a problem and wants to tell someone how she feels about it. The solution is secondary.
I'm not saying do not do the video. It is a romantic gesture. But if not supplemented with changes that make her feel important for more than a minute, it's an empty gesture.
Again, this is just my two cents from experience. I hope it helps on some level.
Good Luck!
