I think this is the most high-effort video on this channel
There are many offsync moments, but it was my first big montage

Unedited song version:    • RETURN 0 Full Compilation (unedited song)  

Almost all parts were taken from here:    • Return 0 Compilation (All parts (Including...  

Timestamps:
0:00 MercuryDT + Viper Arcturus part (   • "RETURN 0" | Full Recreation - Preview #1  )
0:14 YoRied part (   • So yeah my part in RETURN 0  )
0:29 deadlox + Bli part (   • [4K] My part in RETURN 0 (upcoming top Ext...  )
0:44 Ryder unfinished part
0:48 michael's basement fanmade (   • dollar store return 0 (if i made return 0)  )
0:59 deadgamer fanmade (   • Video  )
1:14 Stormfly part
1:29 akun akun part
2:13 nectar part
2:28 Dienid part
2:42 iKrazo part
3:04 Don part
3:34 Ratax part
3:49 nsMonsteR part
4:03 GD Iris part
4:18 Zipixbox part #1
4:48 Beta fanmade #1
4:55 FuzionModzGD fanmade (   • My Part in Return 0 By Mindcap and More! [...  )
5:03 Pegasus Z part
5:17 devin2003 unfinished part
5:29 Bedzui fanmade (   • posting my return 0 fanmade part because y...  )
5:32 Aning Gaming fanmade (   • Return 0 fanmade  )
5:47 Helpegasus part #1
6:17 Helpegasus part #2
6:46 qxu fanmade
6:59 ElPremiun715 part (   • Geometry Dash - My part in Return 0 hosted...  )
7:15 Dashiell10 part (   • My parts in Return 0 by Mindcap and more (...  )
7:46 [unknown creator #1] part
7:59 Beta fanmade #2
8:14 xStep47 part
8:28 Onvil unfinished part
8:33 DumDum fanmade (   • Dashiell10's r0 part REMADE & EXENDED | Re...  )
8:44 ygg24 part (   • My Part in "Return 0" - by Mindcap & more ...  )
8:59 Zephlin part
9:57 Pennutoh part
10:57 Yoonsr part (   • [Geometry Dash] My Part in Return 0 (Cance...  )
11:41 loogiah part
11:56 [unknown creator #2] unfinished part
12:03 Lorri fanmade (   • If i had a part in Return 0  )
12:11 Drane part
12:39 RubChere fanmade
13:09 endevvor scrapped part (   • if i (still) had a part in return 0 | Geom...  )
13:46 Budak Game fanmade
14:15 Zipixbox part #2
14:45 Beta fanmade #3 (   • Return 1 part  )
15:00 ArdnthatN00b fanmade
15:15 kyder fanmade
15:30 squizard unfinished part (   • my part in 'Return 0' by mindcap and more...  )
16:00 The Frostywaffle fanmade (   • I made my own ending to Return 0  )
16:29 Beta fanmade #4