Are you aware that there are free video clips that you can download on Adobe Stock to edit with and use in your projects? These have no watermark and are free to use (check Adobe Stock for any restrictions). I don't believe there is an easy way to locate free clips within Premiere Pro; however, I discovered an excellent way to do this in concert with the Adobe Stock website.
I had hoped Adobe would have short 20 second free samples clips of R3D, BRAW, Pro Res RAW etc so we could trouble shoot and test our systems using the exact same video clips. That would make trouble shooting easier.
I tried posting it in this forum a little while back but it got moved to the Video Lounge. I don't think very many people saw it but I feel like some folks might find it helpful. If it's against policies or something I'll remove it.