"vivid enthusiasm" is correct and usable in written English.
You can use it in any context where you need to emphasize a person's fervor. For example, "The teacher expressed her vivid enthusiasm for the student's work."
You could watch the experiments on the station's website, but it was all done with such enthusiasm and vivid commentary that you really didn't need to.
Concertgoers have come to count on these superb musicians, who are celebrating their 30th anniversary with this series and who continue to play with technical command, musical insight, vivid imagination and tireless enthusiasm.
Her poise, demeanor and enthusiasm painted a vivid picture of how one life can be utterly transformed when parents are willing to take a chance with something different.
Vivid words create more vivid pictures.
The trip provided the material for "Give Me the World," praised for its sharp-eyed, vivid descriptions and for the author's enthusiasm for leaving the beaten path, wherever she was.
Even so, the seven issues of Met Maze are a vivid window into one fan's unbridled enthusiasm for the Mets and the almost instant angst that overcame him (and other fans, no doubt) as he hoped against hope for a winning team to make up for all the years without one.
"Their eyes were so vivid, full of hope, full of energy, full of enthusiasm and full of excitement.
Wright's enthusiasm for her topic comes through in her vivid, compelling writing...
Perhaps one reason Druett's enthusiasm often substitutes for analysis is that her source material, for all the vivid Grand Guignol detail, has unfortunate shortcomings.
Thompson provides a vivid example of the way in which a decadent manner could, paradoxically, be combined with fierce religious enthusiasm.
