Hi Pham,
Here i set up a demo:
www.pamchal.com/test/
I also put a module called "how it is supposed to work" beneath yours just to give u an idea of what i mean about how it should work! In the example module, see how nicely the photos in different sizes are "cropped" and shown vety nice and clean. In your module on the very contrary, when the image sizes are not the same, it looks very filthy and in-organized.
With the solution u proposed to "Zsolt Gyure" as to set a fixed height or for example 234px, it may looks fine but two problems are coming with that:
1- the photos will not be cropped and they will be just resized and because of that, sometimes they look very ugly special if the original photo has a long height which with the fixed height of for example 234px, it looks ridiculous in the thumbnail.
2- If you set a fixed height, then on smaller screens, lets say mobile phones, the thumbnail doesnt change proportionally, so, the thumbnails will have the proper with regarding the small screen size but still with the height of 234px which is toooooo much for small screens.
But in the module I called "how it is supposed to work" since the thumbnail photos are cropped in a nice way, then on any size of screen, they will still fit beautifully.
I hope I could explain the problem and there for a good solution I need from you well defined.
P.s. It seems, your module doesn't play videos and just show the first frame as a picture or am I just see it that way?
Thanks you in advance and I am waiting for a good solution,
Pamchal