1: Awww this was really sweet! Loved it! I think overall, your video flows really well. There were some cases where you passed from a night scene to a daylight scene, and those light flashes you used here and there would have helped you in these kind of situations. The theme is very clear, so nothing to say about that! I think your video would be even more perfect, if you inserted more xmas romance like scenes, mostly because some of those were all from the same episode/moment which makes it feel a bit repetitive? But, in a week, it's already awesome that you were able to gather so many videos in one single video! (Kudos for using Sekaiichi ;D - we should be friends! lol)
2: Despite all the gore going around (sorry I'm easily impressed by these things ;_;), I was able to watch it all, but...I didn't get it? I mean, I don't see your theme here. Neither Winter or Spring? And tbh, I didn't understand the story either, at some points it was really confusing. I think you tried to represent Winter as the sad/horror moments and the Spring as the aftermath? But that wasn't clear at all

I don't think the song helped you either.
3: Your video is quite adorable, I mean, it's K-On, so of course it's adorable! I don't think you pulled the theme well though

your focus was too much on the girls and the music and not really on their trip to London, which during winter is LIKE FREAKING COLD. I think you should have explored more their trip to London, where if I remember correctly, the movie also shows a lot of wintery scenes. ^^'
4: WHY IS THIS SO SHORT?! WHY THE SUDDEN ENDING?! UGH. Ok, calm down. First, 1000x Kudos for the song!!! Second, love the beginning. The concept is amazing, because seriously ever student relates to this. The countdown to Summer Vacations... you have a good start with this video and I really hope you get to complete it!
5: OH I love this! Great idea! Ahah it was actually quite funny! I can tell you I wasn't bored at all while watching it ;d and that usually tends to happen when I never saw the anime!
6: Aw why so short?

I still enjoyed it though, but I wish it was longer

7: Oh god, no you didn't! It's not okay to use this song, nope, no. ;_; Ok seriously, I loved it. My heart was shrinking with every scene! This could also be titled as "The Winter We Fell in Love". The feeling of winter and memories was very clear!
8: Another video that suddenly ends

I don't understand why you say this is Spring though... I clearly see Summer? Despite that, I think you had a really good flow and I like how you went along with the lyrics ;p literally!
9: I liked this video, but I don't think it represents all the seasons like it's described? Maybe just Winter?
10: FAVORITE! Love the concept, the flow, the story and the lip sync. Just genius!
11: LOL, a painful hot Summer day in one video! I think the song really helped you here. You picked funny scenes that went along with really well! I think some scenes flowed better than others, but overall I thought it was quite funny ^^
12: OMG I feel like I was trolled?! AHAH! I wasn't expecting the Harlem Shake at all! It seemed so sweet and wintery and then... puff! Ahah!
13: I like where this was going! I mean, it's not that I don't mind the 5cm, but I would have liked to see other more fitting anime for this. One that fits all that magic you were trying to give us. I think that would be a really cool video, to show Spring blossoming in a magic way? So yeah I would have used more Spring scenes, but more mystical!
14: I liked this one too! I think you used too much Clannad and 5cm though, and when you're doing an anime mix you need to balance your animes a bit more. I love the ending with the violin, I set up a quite nice atmosphere!

15: This is quite and well edited. The theme was very clear, but and I'm sorry if this sounds harsh.. it's just another 5cm video

16: Perfect way to tell a story with this kind of theme, where the song is a very important to key to it! Kudos for you! Also, great anime choice for this!
17: Aw another Summer love story! The theme is clearly represented and your song helped too! The flow is quite good too

18: I think that for those that never saw this episode, your ending wasn't quite clear on how they ended up together. Yes, it's a winter vs spring moments, but why? Why are they together in spring and not in winter? I think these would be fixed if (and this is just an idea) the winter scenes were the present and the spring scenes were his dreams. But for the dreams to be clearer for the viewer, you would need to adjust the coloring, to add a little blur or some glow or even a white vignette like you did in the middle. Something that distinguishes the present from the dreams, you know?
19: Whoa, I really enjoyed this! Your transitions are awesome and the flow was amazing. Also, there's no doubt that the theme is Summer! Good job

20: Is this a video from Shin trolling Sommer?

ahah Anywayyyy, theme wise I think the song quite stablished that the season is Spring, because of the May thing... though maybe you could have I dunno, show some more springy sings? I'm sure there are scenes like that, if you know what I mean ._.
21: This was nice, well edited. The theme is clear, but that's it. There's no story

22: This video ended up too abruptly and I didn't see the season represented. Actually, no season at all... It's just an action video, a good one, but that's it? Where was the theme?
23: This is a good one, but I don't really see a season represented... I see life and people and the world, but that's too vague for a season theme.
24: Aw I really enjoyed this video! So tempted to finally watch this anime too! ^^ I think your song helped to settle the seasons, so good choice!
25: I'm surprised that this is the first video to actually use this song lol. I think the song screams Summer and so did your scene choices. There were some scenes that didn't quite flow well, but other than it's a cool video!
26: Aw I really like this! Quite entertaining, the story and how you told it. Theme is clear enough! I don't know if this is the dropbox player messing up, but it seemed that the quality was a bit low.
27: Your video is cool, though it's lacking on some things for it not be too boring? Some zooms would had been nice, some of your hard cuts are too abrupt and those are breaking the flow. Also, some parts were a bit slow imo. I love the song, but some scenes felt too random?
28: LOL How to do a action video with a winter theme! The sync was very amusing too ;D
29: Aw I still need to watch this anime! Really liked your video, the flow was great and very summerlike.
30: All the Clannad feels!

I enjoyed this, but what I see is the girls from Clannad and Tomoya. The seasons are there, but just barely... know what I mean?