Watch Multiple Vimeo Videos at Once
Paste Vimeo links into the player and they run side by side in one tab. Free for 4 videos with no account, 32 on Pro. Editors use this to hold two cuts of the same sequence next to each other and watch where they diverge.
How to set it up with Vimeo
Open the player
Go to multivideo.io.
Paste a Vimeo link
Copy the vimeo.com URL, drop it in the URL box, and press Add.
Add the second video
Repeat for each clip you want beside it.
Merge two into one frame
Merge mode puts a pair in a single split container, which is the tighter view when you are comparing two cuts.
Mute one side
Leave the audio running on whichever version you are judging.
Worth knowing
Password-protected and private videos will not play
Vimeo blocks embedding on videos with privacy settings applied, and on some Vimeo accounts embedding is restricted to named domains. Both are settings on the video owner's side.
Comparing cuts frame for frame
The players run independently, so they will drift apart over a long clip. For a close comparison, scrub both to the same point and start them within a second of each other.